Ronny Kohavi @ronnyk
Former exec at Microsoft, Airbnb, Amazon. Teaching interactive Zoom class on A/B Testing at https://t.co/6jHfCKuOXC Co-author of https://t.co/xqmAdDs9oH kohavi.com Los Altos, CA Joined September 2007-
Tweets1K
-
Followers4K
-
Following404
-
Likes3K
Lightning Lesson on Maven (free): A/B Testing Replication Crisis: Lessons from 10 Large-scale A/B tests. Register at bit.ly/ABTrustworthyP… (March 4, 2026, 10AM PST). Claims of large lifts in A/B tests are widespread, yet many are supported by small online experiments that are likely underpowered. To address this, the Trustworthy A/B Patterns project, a community replication effort, evaluates selected patterns at high statistical power. We share the design and results from 10 A/B tests across four patterns tested with millions of users: 🔘 Rounded buttons ⚡ Page performance 🎟️ Coupon-code fields 📌 Sticky call-to-actions In this 45-minute lightning lesson, we will cover key experimental design choices, actual results, and practical lessons learned. #abtesting #experimentation #experimentguide #causalinference #statisticalPower
We invite you to join the community project. See bit.ly/trustworthyABP…. We offer free help to design and analyze your replications in exchange for sharing the results.
The Winner's Curse: 10 Large-Scale A/B Testing Replications. Here is a summary of the 10 replications completed for the Trustworthy A/B Patterns community project: bit.ly/trustworthyABP… In June 2024, @lukasvermeer, @jlinowski, and I, started a community project to replicate patterns after seeing an implausible lift for rounded vs. square buttons. The first three replications confirmed that the initial results were highly exaggerated (summarized at bit.ly/powerAnalysisE…). But what about other common patterns? We have now summarized seven additional A/B tests across four patterns (rounded buttons, page performance, coupon-code field, and sticky call-to-action). These experiments were large, with a median of 2.2M users per experiment and 80% power at our pre-selected minimum detectable effects (MDEs) of 0.3% to 2.2%. #ABTesting #ExperimentGuide #TrustworthyABPatterns
Want to run A/B tests you can trust—and ship faster with fewer false wins? My next Maven cohort of Accelerating Innovation with A/B Testing starts Jan 26, 2026 (5 live, interactive sessions × 2.5 hours). ✅ Start time: 12:00pm Pacific (later time for once, as requested by folks in Australia & New Zealand) ⭐ Maven rating: 4.8/5.0 💬 Highly interactive: lots of Q&A, real stories, messy problems, not just theory Sign up here: bit.ly/ABClassRKT A couple of testimonials from the last cohort (bit.ly/ABClassRKTesti…): - I highly recommend this course. Ronny is a great lecturer who covers a fantastic set of topics, striking the right balance for both new and experienced experimenters. The sessions are highly interactive, offering plenty of room for Q&A and discussion -- Algorithms Analytics Manager, Taboola - One of the best courses on experimentation I have taken, with a strong focus on real-world learnings. Ronny is a genius. He is extremely patient and great at answering questions with practical, experience-driven insights -- Lead Data Scientist, Docusign #ABTesting #ExperimentGuide #DataScience #ProductManagement @MavenHQ
Our paper, Statistical Challenges in Online Controlled Experiments: a Review of A/B Testing Methodology, is now the 13th most read paper of all time in The American Statistician (measured by views, now over 25,000). It's open access so PDF is downloadable. - Main paper: tandfonline.com/doi/full/10.10… - Supplement: tandfonline.com/doi/suppl/10.1… Most read statistic page: tandfonline.com/action/showMos… (switch to "All time" tab at the top). #abtesting
Note: 1. This is part of the Trustworthy A/B Patterns project (bit.ly/trustworthyABP…), where we are serious about proper statistical power and trust. In fact, the first run of this test had an SRM (Sample Ratio Mismatch), and this is the second run. 2. This is not one of those low-power implausible results that says “round the corners of buttons and click-through rate will improve 55%” (recently summarized at bit.ly/roundedCorners…). 0.3% improvement to revenue is realistic and material to the business. 3. The treatment effect is smaller than those summarized in Trustworthy Online Controlled Experiments: A Practical Guide to A/B Testing, Chapter 5, because those experiments improved performance of every page, while this experiment improved a single page (the home page).
Improving performance by caching home page components improves revenue by ~0.3%. See bit.ly/PerfABPattern for details. Talabat, a subsidiary of Delivery Hero, ran an experiment with Eppo by Datadog to measure the revenue impact of a speedup of the home page achieved via smart caching. The speedup in Time-To-Interactive (TTI) was from ~2.1 seconds to ~1.0 seconds. Revenue per user improved by 0.36%. Applying a haircut because of sequential inference, we believe an unbiased estimate is ~0.3%. #ABtesting #experimentguide #perf
A/B Testing: The Science of Not Fooling Yourself (my guest post on New Economies): neweconomies.co/p/ab-testing-t… Covering four topics 🧪 Why reported results are often wrong, the hierarchy of evidence, and replication 📉 A p-value of 0.05 does NOT imply that B is better than A with 95% probability. It’s about 78%. 📊 To run trustworthy A/B tests, you need large samples: 240,000 users is where the magic happens and when you can run hundreds of concurrent A/B tests ⚠️ Be skeptical of extreme results with high lifts #ABTesting #ExperimentGuide #pvalue
Just crossed 40K LinkedIn followers - thanks! I compiled the best-of since 30K followers at bit.ly/RonnyK40KLinke… It’s nice to see that many posts were motivated by questions in the Maven courses I teach (bit.ly/ABClassRKT, bit.ly/AdvancedABRKX), so thanks to all the students that asked interesting questions! #ABtesting #ExperimentGuide #CausalInference #DataScience
🧠 [Primer] Online Testing • onlinetest.aman.ai - Online testing is a statistical experimentation framework where changes are tested directly with live users in digital environments. It enables organizations to make decisions based on real-world user interactions, rather than solely relying on assumptions or offline evaluations. - A/B testing (also known as split testing) is one of the most common forms of online testing, where two variants (A and B) are compared against each other to determine which performs better. A/B/n testing is an extension of this approach that allows multiple variants (A, B, C, etc.) to be tested simultaneously. Together, these methods form the backbone of online testing, helping organizations optimize digital experiences, marketing strategies, and product features in controlled, measurable ways. - Shoutout to @elgeish and @ronnyk, from whom I've learned my fundamentals in online testing! 🔹 Purpose of Online Testing 🔹 How Online Testing Works 🔹 Steps Involved 🔹 Stable Unit Treatment Value Assumption (SUTVA) • Key Components • Why SUTVA Matters • Examples of SUTVA Violations in Online Testing • Strategies to Ensure Compliance • Handling Violations • Benefits 🔹 Common Applications of Online Testing • Website Optimization • Email Marketing • Mobile App Optimization • Digital Advertising • Pricing Strategies • UX Improvements 🔹 Benefits of Online Testing 🔹 Challenges and Considerations in Online Testing • Sample Size Requirements • Time Constraints • False Positives and False Negatives • Confounding Variables • Cost of Experimentation • Test Interference (Cross Contamination) 🔹 Advanced Variants of Online Testing • Multivariate Testing • Split URL Testing • Bandit Testing • Personalization and Segmentation • Sequential Testing • Adaptive Testing 🔹 Parameters in Online Testing • Sample Size (n) • Minimum Detectable Effect (MDE or Δ) • Significance Level (α) • Statistical Power (1 −β) • Baseline Conversion Rate (μ) • Variance (σ^2) • Test Duration • Confidence Interval (CI) • Effect Size (Observed Δ) • Traffic Allocation 🔹 Statistical Power Analysis 🔹 The Interplay Between Significance Level/Type I Error (α) and Type II Error (β) • Factors Influencing the Relationship Between α and β • Comparative Analysis • Rule of Thumb: Scaling Sample Size for A/B/n Tests • The Perceived Severity of Errors • A Misconception about α and β Ratios • Practical Implications: Balancing α and β 🔹α Percentile 🔹 Measuring Long-Term Effects in Online Testing 🔹 Related: Dogfooding vs. Teamfooding vs. Fishfooding in Online Testing 🔹 Managing Test Conflicts and Overlap 🔹 Ensuring Balanced Allocation Groups 🔹 Related: Statistical Significance for Offline Data • Key Differences from Online Testing • Techniques for Establishing Statistical Significance on Offline Data • Using Confidence Intervals and Power Analysis • Comparative Analysis: Online vs. Offline Significance Testing Primer written in collaboration with @VinijaJain. #Testing
Thanks for the shoutout, @i_amanchadha. For those interested in learning more, I teach an interactive online course on A/B Testing: bit.ly/ABClassRKT (starts Dec 1st, 2025) and there is a follow-on advanced A/B testing course: bit.ly/AdvancedABRKX (starts Dec 15, 2025)
Running concurrent A/B tests is essential to scale. Many organizations hesitate to run experiments in parallel, fearing that they will interact, but the concerns are overstated: - Concurrent testing is essential to scale - Strong interactions are rare in practice - Most concerns are overblown In the article at bit.ly/ABTestingInter…, I share examples of antagonistic and synergistic interactions, how to detect them, and why leading companies safely run thousands of concurrent experiments. The graph (from experimentguide.com) shows experimentation growth at Bing, Google, LinkedIn, and Office. The growth is relative to the first year where experiments ran at a scale of one new experiment per day. #abtest #experimentguide
Next Monday, 8 Sept 2025, we start a new live cohort of the course Accelerating Innovation with A/B Testing on Maven. Register at bit.ly/ABClassRKT Five x 2.5-hour interactive sessions. Maven rating 4.7/5.0. Most employers reimburse the course, given the high ROI. Human testimonials at bit.ly/ABClassRKTesti…. ChatGPT 5 recommended in image below :-)
Honored to be listed in AB Tasty's 16 Experimentation Influencers You Should Follow: bit.ly/44g7nuK As for the image background color, I think it should be A/B tested :-) My online interactive course: Accelerating Innovation with A/B Testing starts this Monday, July 7th: bit.ly/ABClassRKT
Fair question. 1. For the first course, half the material is in the book. For the second book, it's all new. 2. Many people find the ability to hear the material with stories and examples easier to digest. 3. You get to ask questions. I stay after class until all questions have been answered. See the reviews. If people continue to register and give positive feedback, I enjoy teaching.
The "Student's t-test," widely used in A/B testing, could have been called the "Guinness t-test,” if it wasn’t for management's reluctance to allow publications associating the company’s employees with the published research. William Sealy Gosset (1876–1937) developed this critical statistical test while working as a brewer for Guinness, the Irish brewery. However, Guinness management prohibited employees from publishing research under their real names or sharing any company data. Consequently, Gosset published his groundbreaking work under the pseudonym "Student." Imagine the brand recognition Guinness missed by insisting on anonymity! Instead of running "Student's t-tests," thousands of companies today could be proudly performing the "Guinness t-test." References at linkedin.com/posts/ronnyk_a… For more real stories, I teach an interactive online course on A/B Testing with a lot of them, making the material accessible: bit.ly/ABClassRKT #ABTesting #ttest #experimentguide #branding
The next cohort of Accelerating Innovation with A/B Testing with Maven starts May 12, 2025. Sign up at bit.ly/ABClassRKT The logos slide shown, of companies that sent at least two people, has been updated and now includes Wikimedia, Splunk, Estee Lauder, Docusign, StockX, Calendly, and Audible. Read testimonials at bit.ly/ABClassRKTesti…
Why you should default to running #ABTests at 50/50? You sometimes hear: this is a risky idea, so we should run it at 10%, or this is a learning experiment that’s expensive (e.g., removing ads), so let’s run it at 10%. The logic for running a treatment at 10% is often flawed. Assuming you run equally sized variants to avoid the many issues plaguing unequal variants (see bit.ly/ABTestingIntui… Section 7), then power calculations determine the number of users you need in each treatment to detect a certain effect size (Minimum Detectable Effect). If you need 100K users in the treatment, and it will take you five weeks when allocating 10% of users to the treatment, then you’re better off running at 50% and getting the answer five times faster: in one week. Why wait five weeks to make a decision? Agility matters! Exceptions and some discussion in in linkedin.com/posts/ronnyk_w…
Sean J. Taylor @seanjtaylor
44K Followers 4K Following model measurement @OpenAI. Formerly @MotifAnalytics @Lyft and @Facebook. Keywords: Experiments, Causal Inference, Statistics, Machine Learning, Economics.
Erik Bernhardsson @bernhardsson
56K Followers 4K Following Building everyone's favorite AI infrastructure platform @modal
Dan Goldstein @dggoldst
13K Followers 1K Following Partner Research Manager at Microsoft Research NYC. AI, Economics, Decision Science.
Lenny Rachitsky @lennysan
387K Followers 3K Following Deeply researched product, growth, and career advice
Dean Eckles @deaneckles
16K Followers 2K Following networks, contagion, causality. @MIT professor not often on X deaneckles, eckles & https://t.co/R8agGpE8ii elsewhere
Fernando Diaz @841io
6K Followers 1K Following Associate Professor, CMU. Researcher, Google. Evaluation and design of information retrieval and recommendation systems, including their societal impacts.
David Holtz @daveholtz
6K Followers 3K Following professor at @columbia and visiting economics researcher at @openai
(((ل()(ل() 'yoav)))... @yoavgo
84K Followers 2K Following
Garrett Johnson @garjoh_canuck
4K Followers 4K Following Marketing professor @BUQuestrom researching digital marketing: privacy (#GDPR & value+death of 🍪) & effectiveness (👻 ads). Could run Oilers better. 🇨🇦,🇺🇸.
Delip Rao e/σ @deliprao
69K Followers 5K Following Busy inventing the shipwreck. @Penn. Past: @johnshopkins, @UCSC, @Amazon, @Twitter ||Art: #NLProc, Vision, Speech, #DeepLearning || Life: 道元, improv, running 🌈
Avi Goldfarb @avicgoldfarb
10K Followers 2K Following Professor at Rotman, University of Toronto. Author, Prediction Machines, Power and Prediction.
Emre Kıcıman @emrek
4K Followers 805 Following causal ml; ai+society; social media, comp social science. having fun. sr principal researcher @MSFTResearch. my opinions. he/him. https://t.co/xrYFOeNhaC
Pinar Yildirim @Prof_Yildirim
8K Followers 3K Following Researcher of digital economy technology, and media. Tweets on marketing, business, economics, tech, policy, life.
Deedy @deedydas
247K Followers 6K Following Partner at @MenloVentures. ex-founding Glean, Google Search. Cornell CS. Investor: Anthropic, OpenRouter, Modal, WisprFlow, Inception, Goodfire, PrimeIntellect
scott cunningham @causalinf
53K Followers 6K Following Economics professor paying it forward with 55 burgers, 55 fries, 55 tacos, 55 pies, 55 Cokes, 100 tater tots, 100 pizzas, 100 tenders, 100 meatballs
Sinan Aral @sinanaral
59K Followers 9K Following David Austin Professor @MIT; Director @MIT_IDE; Founding Partner, Manifest & Milemark Capital; Author, The Hype Machine, ex-Chief Scientist @SocialAmp @Humin
Rem Koning @orgRem
8K Followers 2K Following Professor @HarvardHBS. Researching how AI is changing entrepreneurship and how tech can broaden the benefits of startups and innovation. Teach https://t.co/uMtwbLUpTj
Ye-ho-SHU-a (phonetic... @AnalyticsNinja
10K Followers 729 Following My views do represent the views of my employer. Hippie Orthodox Rabbi father of 5. Wannabe Co-Author: Analytics Banquet.
Blair's AI Curiosity @Blair_tang
0 Followers 44 Following UPenn Computer Science Investment banker focusing on AI, Robotics and Healthcare Insights on Business, AI, Robotics and anyting edgy
datathink @datathinkHQ
0 Followers 46 Following Develop the reasoning that makes you effective with data. Premium interview practice for data engineers, analysts, scientists & AI roles. https://t.co/64Nss3sAtX
Gianko @gianzuetta
17 Followers 59 Following
Mohammad Zia Rahamat @zia_rahamat
23 Followers 241 Following A curious mason 📐🎨 of the consumer internet world. I do math, product & growth for startups and tech companies for a living.
Katja Berlin @DrKatjaBerlin
4 Followers 30 Following physicist, Halloween lover, escape game enthusiast and world traveler
Ben Fanning @fanning_tweets
0 Followers 19 Following
Zaaa Zhg @ZaaaZhg26031
0 Followers 7 Following
Gabriel Capanema @bielcapanema
89 Followers 512 Following 🐧 Trabajar menos, trabajar todos, producir lo necesario, redistribuir todo;
DataSense @datasense_ac
1 Followers 39 Following
Andrea @andre09193
0 Followers 16 Following
Arjun @arjuns247
88 Followers 563 Following
Niko Tikkanen @nikotikkanen_
8 Followers 169 Following Building @spectry_io • Passionate about coding, analytics, data, and building meaningful products.
Nags @buildbynags
0 Followers 8 Following Building data tools for analysts and growth teams | Senior DA @ scale
Nik J @somekindaburner
0 Followers 119 Following
Quentin Lecocq @QuentinLecocq_
9 Followers 68 Following Builder technique. Dev fullstack CDI (grand e-commerce FR) · audits CRO freelance pour SaaS/e-commerce · sites pour artisans → https://t.co/PeDP7wwFQ3
___ @mg4ch3YRapBlxiF
0 Followers 875 Following
NIKITA @NIKITA1160745
0 Followers 3 Following
Devis J. Jones @DevisJJones
3 Followers 12 Following Senior Product Manager || Senior Game Producer || Hobby - Vibecoding game developer
Fiona Blake @fionablake1245
0 Followers 42 Following I moved to Los Angeles from the Netherlands in 2018 and founded a fashion design company, which I still runs as CEO.
hardik dhamija @DhamijaHardik
78 Followers 726 Following const bio = "Cricket & Chess enthusiast | Professional Developer 💻 | Curious explorer 🌍";
soosoo @soosoogee
5 Followers 504 Following
Apoorva @modiapoorva
49 Followers 213 Following
Ashley Stirrup @AshleyGrowthB
7 Followers 37 Following
GrowthBook @growth_book
604 Followers 43 Following GrowthBook is an open-source feature flagging and experimentation platform that helps you release code better and measure the impact with your own data.
Даниил DL-Compa... @DLCompany3
2 Followers 44 Following
Shoaib | شُعَيْ... @shoaibnajeeb
186 Followers 2K Following Data Scientist. Sports Analytics Enthusiast. Stock Market Data Analytics.
Shoaib @0xshoaib_nft
0 Followers 21 Following
Taylor Stull @TaylorStull
33 Followers 304 Following Thoughts are my own. Building with AI, helping people add quality years to their life and access the best education for their kids. ex founder, ex @mindbloom
Pete @lowepe1
22 Followers 1K Following
JJ Santos @jjsantoso
2K Followers 2K Following Economi(ci)sta, trabajando con datos. Estoico ante lo estocástico. Olvido las películas que veo y los libro que leo.
Halcyon Last @hmaisonjames
636 Followers 6K Following
Ranga R @RangaR54708109
0 Followers 100 Following
arnau peña @ArnauGB0011
0 Followers 34 Following
souta tochi @SoutaTochi22277
0 Followers 15 Following
Evidence in the Wild @EvidenceWild
6 Followers 35 Following
TiffanyWright @Om6617896J5boh
207 Followers 6K Following Equal parts glitter and existential dread ✨😅
Anabel Aufderhar @AAufderhar50788
147 Followers 5K Following
Pete @PistolPeteBoluk
44 Followers 2K Following
Ron Lussari @RonLussari
520 Followers 407 Following Product Leader - Growth & AI | Scaling Startups with Product-Led Strategies for Adoption, Growth & AI Innovation
Yann LeCun @ylecun
1.2M Followers 787 Following Professor at NYU & Executive Chairman at AMI Labs. Ex-Chief AI Scientist at Meta. Researcher in AI, Machine Learning, Robotics, etc. ACM Turing Award Laureate.
Ethan Mollick @emollick
365K Followers 585 Following Professor @Wharton studying AI, innovation & startups. Democratizing education using tech Book: https://t.co/CSmipbJ2jV Substack: https://t.co/UIBhxu4bgq
John Cutler @johncutlefish
117K Followers 10 Following I like the beautiful mess of product development.| newsletter: https://t.co/tCLvCkCdiS
Shreyas Doshi @shreyas
359K Followers 1K Following Led a couple of Stripe's most successful products from early days. Prev Twitter, Google, Yahoo. Now advising founders, coaching executives, teaching what I know
vicki @vboykis
59K Followers 1K Following I move vectors to different machines sometimes. Founding ml engineer in recsys/search. I like to build stuff, reading, and Nutella.
Sean J. Taylor @seanjtaylor
44K Followers 4K Following model measurement @OpenAI. Formerly @MotifAnalytics @Lyft and @Facebook. Keywords: Experiments, Causal Inference, Statistics, Machine Learning, Economics.
Andrew Ng @AndrewYNg
1.7M Followers 1K Following Co-Founder of Coursera; Stanford CS adjunct faculty. Former head of Baidu AI Group/Google Brain. #ai #machinelearning, #deeplearning #MOOCs
Pe:p Laja @peeplaja
47K Followers 1K Following I know what your target customers (ICPs) think of you. CEO @wynter_com. Founder @cxldotcom @speero_agency. Host of How to Win podcast.
Lenny Rachitsky @lennysan
387K Followers 3K Following Deeply researched product, growth, and career advice
Dean Eckles @deaneckles
16K Followers 2K Following networks, contagion, causality. @MIT professor not often on X deaneckles, eckles & https://t.co/R8agGpE8ii elsewhere
Judea Pearl @yudapearl
84K Followers 370 Following Student of causal inference, human reasoning, and history of ideas, all viewed through the sharp lens of artificial intelligence.
Pedro Domingos @pmddomingos
131K Followers 178 Following Professor of computer science at UW and author of '2040' and 'The Master Algorithm'. Into machine learning, AI, and anything that makes me curious.
Garrett Johnson @garjoh_canuck
4K Followers 4K Following Marketing professor @BUQuestrom researching digital marketing: privacy (#GDPR & value+death of 🍪) & effectiveness (👻 ads). Could run Oilers better. 🇨🇦,🇺🇸.
Steven Sinofsky @stevesi
209K Followers 5K Following Subscribe https://t.co/Xm1OaUU8jk • seed investing • writing • ॐ •🙏• I use '—' and no AI to write • tweets saved 90 days • 📷
Jeremy Howard @jeremyphoward
321K Followers 7K Following 🇦🇺 Co-founder: @AnswerDotAI/@FastDotAI ; Prev: Professor@UQ; @kaggle founding president; founder @fastmail/@enlitic/… https://t.co/16UBFTX7mo
scott cunningham @causalinf
53K Followers 6K Following Economics professor paying it forward with 55 burgers, 55 fries, 55 tacos, 55 pies, 55 Cokes, 100 tater tots, 100 pizzas, 100 tenders, 100 meatballs
Sinan Aral @sinanaral
59K Followers 9K Following David Austin Professor @MIT; Director @MIT_IDE; Founding Partner, Manifest & Milemark Capital; Author, The Hype Machine, ex-Chief Scientist @SocialAmp @Humin
Thomas G. Dietterich @tdietterich
62K Followers 651 Following University Distinguished Professor (Emeritus), Oregon State Univ.; Former President, AAAI; Currently Chair CS Section of ArXiv
U.S. Central Command ... @CENTCOMHebrew
26K Followers 39 Following החשבון הרשמי של פיקוד המרכז של צבא ארה"ב בעברית
Manisha Mishra @manishamishra24
15K Followers 22 Following Sharing Latest AI Tools, Resources & Tech News | 💌 Collabs [email protected] | Free Coding, AI & Dev Tools to Learn | #AItools #AI #Developers
kvaradona @kvara_7PSG
25K Followers 483 Following უფლის იწამე მარად 🙏🏻 PSG Adidas 🇬🇪 #Nakrebi Non affilié à @kvara7. Nouveau compte X Fan Account
U.S. Central Command @CENTCOM
1.6M Followers 121 Following The official account of U.S. Central Command.
GrowthBook @growth_book
604 Followers 43 Following GrowthBook is an open-source feature flagging and experimentation platform that helps you release code better and measure the impact with your own data.
Polymarket @Polymarket
1.7M Followers 6K Following The World's Largest Prediction Market. Trade politics, news, crypto, culture, sports, tech, & more. Discord: https://t.co/tzKrbDfF3x
Joey Politano 🏳️... @JosephPolitano
93K Followers 2K Following Writing a data-driven newsletter about economics @ https://t.co/IanQ9oPoPi | Nuance? In this economy? | Full Employment Stan, Brazilian Coffee Tariff Victim
Patrick Hulce @patrickhulce
1K Followers 363 Following creator @OptyxApp, @____lighthouse CI, third-party-web ; maintainer jpeg-js, @TestingLib, https://t.co/OQCX2LPfZK ; formerly @google, @ChromeDevTools, @Yahoo
Straight Talk @NoSpinEvidence
843 Followers 158 Following The Evidence-Based Policy team at @Arnold_Ventures distinguishes credible findings of program effectiveness from the many others that claim to be.
Alan Dershowitz @AlanDersh
461K Followers 154 Following Professor at Harvard Law School for 50 years, now emeritus. Active in litigation, writing, and defense of civil liberties and human rights.
Israel Defense Forces @IDF
3.3M Followers 35 Following Official IDF X account. We post real-time information and updates from the field.
Noa Tishby @noatishby
256K Followers 850 Following 2x NYTimes best-selling author. Former Special Envoy for Combating Antisemitism. 📲 Text me 818-408-4344
chartr 📊 @chartrdaily
28K Followers 319 Following 💡The #1 newsletter for visual thinkers. 📊 Culture. Money. Entertainment. Society. Chartr, Ltd. is part of the Sherwood Media group.
AGI House @agihouse_org
24K Followers 1K Following Accelerating humanity's transition to AGI — Note: we are exclusively located in Hillsborough, CA, no physical location in SF nor any other city yet.
Gina Gotthilf @ginag
10K Followers 1K Following Co-founder / CMO at Outsmart (stealth). Former VP at Duolingo, Latitud, Tumblr, Mike Bloomberg presidential campaign . Email me at [email protected]
Aswath Damodaran @AswathDamodaran
490K Followers 3 Following Fascinated by finance & markets and like writing about them, but teaching is my passion.
Henrik Widegren @HenrikWidegren
3K Followers 73 Following Läkare och artist. Pratar och sjunger om medicin, vetenskap och annat 🤓🎸🤘 YouTube, Spotify: Henrik Widegren
Park City Mountain @PCski
56K Followers 3K Following #ThisisYourMountain. Ski, ride and explore over 7,300 acres of terrain. Follow @PCMtnAlert for weather and lift updates.
Erik van Zwet @ErikVanZwet
781 Followers 53 Following Statistician @LUMC_Leiden @bds_lumc Find me at https://t.co/Hkz40kbGAF
Michael Mauboussin @mjmauboussin
158K Followers 378 Following Decisions, books, investing, mental models, complex adaptive systems, skill, luck. Adjunct Prof @Columbia_Biz and Chairman Emeritus of the Board @sfiscience
Scott Adams @ScottAdamsSays
1.4M Followers 2K Following The 2026 Dilbert Desktop Calendar (double-sided) is available now, only on Amazon for USA. Beware of pirates!
Ad Professor @The_AdProfessor
196K Followers 180 Following Built ad campaigns for multiple billion-dollar companies. Spending over $100K per month on ads and need help? Let's work together here: https://t.co/1NdyfF4HyV
Dan Benoni @DanBenoni
950 Followers 57 Following Product psychology tips (in a comic book format). Cofounder @GrowthDotDesign
Growth.Design @GrowthDotDesign
15K Followers 2 Following 🧠 Product tips in a comic book format. (by @DanBenoni & @LouisXavierL)
Louis-Xavier @LouisXavierL
9K Followers 110 Following Co-founder @GrowthDotDesign | Previously @bombardierjets
VBT Bicycling Vacatio... @VBTVacations
3K Followers 2K Following Positively impacting people's lives through active travel experiences.
Leah Tharin @LeahThar
1K Followers 33 Following Growth fanatic and ML-Product leader. I'm only on Twitter because I have to. https://t.co/97GgAGYmX8
Noga Kohavi 🇺🇸�... @Venusstars12
1 Followers 6 Following
Nick St. Pierre @nickfloats
176K Followers 2K Following Unofficial Midjourney shill. Playing with AI & sharing learnings.
Jim Tomanchek 🥃 @jimtomanchek
892 Followers 1K Following NY by way of SF. Husband to @kelves88. Dawgs, Braves, and Falcons fan. VP, Global Partnerships @Sprinklr. Former @adaptly @twitter @oracle.
Fareed Mosavat @far33d
13K Followers 2K Following Visiting Partner, @a16z speedrun. Did some important-ish stuff at Reforge, Slack, Instacart, Runkeeper, Zynga, and Pixar.
Gibson Biddle @gibsonbiddle
30K Followers 3K Following Former Netflix/Chegg VP/CPO. Many virtual talks/workshops. Guest lecturer @INSEAD & Stanford. My free “Ask Gib” Product Newsletter: https://t.co/EM21Ic1Ag4
Fernando Martel Garc�... @fmg_twtr
431 Followers 784 Following Causal Inference, Enterprise Experimentation & ROI Strategy (ex-Microsoft, Nike, Marriott)
Gavin Newsom @GavinNewsom
3.1M Followers 18K Following Husband to @JenSiebelNewsom and father. 40th Governor of California. Host of podcast This is Gavin Newsom.
Book DNA 📚 @mybookdna
2K Followers 32 Following We’re building a smarter, more personal way to manage your reading life, with recommendations and insights via your Book DNA.
Yuval Noah Harari @harari_yuval
658K Followers 166 Following Historian and bestselling author of 'Sapiens', 'Homo Deus', '21 Lessons for the 21st Century', 'Nexus', 'Unstoppable Us' and 'Sapiens: A Graphic History'.
Chief Conversionista @Conversionista
4K Followers 359 Following Passionate about Web site conversion & Landing page optimization. Follow = get tricks of the trade!
Cassandra Unchained @michaeljburry
2.0M Followers 33 Following Official X account for Michael Burry, MD, called "Cassandra" by Warren Buffett. Now on Substack with the full story.
CAUSL @causl_
24 Followers 0 Following We are CAUSL - A product measurement consultancy. https://t.co/2kPu9mkJXl






















