Ankur

Co-Founder/CEO @ Fifteenth ( - taxes for tech people. Previously rippling, flexport, twitter, facebook

[Ankur @ankurd]

Really cool to see love for @fifteenth_tax in the wild! 🙏

[Liz Wessel @lizwessel]

I have no affiliation whatsoever w/ this company so please know this is a sincere endorsement: the tax platform @fifteenth_tax crushed it this year for my family. They did a 10x better job explaining where my taxes shook out than any prior accountant we’ve worked with, and made the whole experience of doing our taxes (collecting docs, reporting correctly, etc) so much easier and better. Highly recommend.

[Ankur @ankurd]

@lizwessel @fifteenth_tax Thanks for the shoutout, Liz! We have been laser focused on building a tax experience that's modern, efficient and most of all, loved by users - really glad it came through.

[Fifteenth @fifteenth_tax]

👋 Meet the co-founders behind Fifteenth

@ankurd navigated taxes as a founder + early employee at companies like @X , @flexport , and @Rippling . He couldn't get clear answers on the tax treatment of complex equity compensation, now he's building a better way.

@LauraMoreno_CPA , CPA, built @cartainc's tax advisory business and worked with high net worth family offices advising on tax strategy. She’s who you want in your corner when the stakes and numbers - get real.

Together, they’re building Fifteenth to deliver proactive tax guidance for ambitious earners -  built for modern careers, complex compensation, and long-term wealth.

[Ankur @ankurd]

Regular tax firms don't grow like this. They stop taking clients after December and only grow 10% YoY.

@fifteenth_tax is doing something different. We've been growing 20% MoM for the last 6 months, and it's only accelerating into this tax season.

Why are we able to accept so much inbound? Because our CPAs are 10x more effective. All the grunt work is done by AI agents while humans provide expertise at the tail end, ensuring better client experience and higher accuracy!

PS we are still taking on clients (yes, even in March!)

[Ankur @ankurd]

@fifteenth_tax is the tax solution for innovators!

[Nichole Wischoff @NWischoff]

Optimal venture firm tech stack (after trying a lot of providers):
-Bank: Stifel (fund)/ @rhobusiness (portcos)
-Fund Admin: Standish (hated AngelList for this)
-Management Co Accounting: Standish
-Legal: @Orrick
-Taxes: Moss Adams now Baker Tilly (funds)/ personal (@fifteenth_tax)
-CRM: Streak (Hated Affinity and Attio)
-SPVs: @AngelList
-Platform for Portcos: @NotionHQ
-Sourcing: @clay mostly for some outbound
-Brand/logo: @elanmiller
-Website design/pitch decks: @alexbanaga/ EatCaviar dot co (raised three funds with him)
-Payroll: @joinwarp
-401k: Still hate every option but @humaninteresthq sucks the least

[Ankur @ankurd]

It's a good day when you get a dozen sign ups before the morning coffee ☕️

[Ankur @ankurd]

@lihararora I'd say 30B+. Given their market position, they are quite likely to hit 3-4B rev in the next few years.

[Ankur @ankurd]

Wild that Figma is trading at a $17B valuation. One of the few true monopolies in tech right now!

[Ankur @ankurd]

Gemini 3 is a phenomenal model. Most of our evals went up by ~5% and are now >= human scores.

Thanks @GoogleAI!

[Google AI @GoogleAI]

For developers, Gemini 3 Pro offers unparalleled results across every major AI benchmark compared to Gemini 2.5 Pro.

Here three ways Gemini 3 Pro can improve your workflow today:

1. Gemini 3 Pro fits right into existing production agent and coding workflows. It is also integrated into development environment experiences across the ecosystem of developer products like @GoogleAIStudio, Gemini CLI, and Android Studio.

2. We introduced Google @antigravity, a new agentic development platform that reimagines how the model and IDE work together. It enables developers to manage agents to work at a higher, task-oriented level collaborating with agents while they build.

3. We’ve built @GoogleAIStudio to be your fastest path from a prompt to an AI-native app. Build mode lets you add AI capabilities faster than ever, automatically wiring up the right models and APIs, while features like annotations enable fast and intuitive iteration.

Whether you’re building a one-shot prompt game or an interactive landing page from unstructured voice notes, you can bring any idea to life with Gemini 3.

[Ankur @ankurd]

@immad @davidu We’re doing the tax part of this @fifteenth_tax

[Arena.ai @arena]

🚨 Leaderboard Update
Claude Opus 4.1 Thinking by @AnthropicAI debuts in the Text & WebDev Arenas - going straight to the top. 🚀

A few highlights:
💠Claude Opus 4.1 is now the only model to rank #1 across all major categories
💠#1 Overall, tied with three other models: gpt-5-high, Gemini-2.5-pro, and Claude Opus 4.1
💠#1 in WebDev & Coding, showing strong real-world coding performance

Learn more about what the community prompts and votes reveal about Claude Opus 4.1 Thinking in thread 👇

[Ankur @ankurd]

On our evals, GPT5 does slightly worse than Claude 4 Sonnet and takes 4x longer! To be fair, the prompt isn't tuned for GPT5 but still a bit disappointing - definitely doesn't feel like a SOTA model.

[Ankur @ankurd]

Caveats: SALT = state + property taxes. These reduce taxable income up to the cap.

But:
– Cap starts phasing out above $500K income
– Fully back to $10K by $600K+ income

So this mainly helps folks in the $300K–500K range.

[Ankur @ankurd]

Big win for CA/NY residents in the BBB: the SALT cap jumps from $10K to $40K. If you’re earning in the mid six figures and paying big in property/state taxes, that’s an extra $5K–$10K in your pocket.

[Sam Altman @sama]

I’m not big on identities, but I am extremely proud to be American. This is true every day, but especially today—I firmly believe this is the greatest country ever on Earth. The American miracle stands alone in world history.

I believe in techno-capitalism. We should encourage people to make tons of money and then also find ways to widely distribute wealth and share the compounding magic of capitalism. One doesn’t work without the other; you cannot raise the floor and not also raise the ceiling for very long.

The world should get richer every year through science and technology, but everyone has to be in the “up elevator”. I think the government usually does a worse job than markets, and so we need to encourage our culture of innovation and entrepreneurship. I also believe that education is critically important to keeping the American edge.

I believed this when I was 20, when I was 30, and now I am 40 and still believe it. The Democratic party seemed reasonably aligned with it when I was 20, losing the plot when I was 30, and completely to have moved somewhere else at this point. So now I am politically homeless. But that’s fine; I care much, much more about being American than any political party.

I’d rather hear from candidates about how they are going to make everyone have the stuff billionaires have instead of how they are going to eliminate billionaires.

The American experiment has always been messy. I am hopeful for another great 250 years. Happy 4th!

[Ankur @ankurd]

Our Resource Center is built for folks navigating equity events, IPOs, and comp complexity. Getting this right could save you thousands in taxes!

Start learning: https://t.co/erMaYkEmpu

[Ankur @ankurd]

If you work (or worked) at Scale, Figma, Gusto, or Rippling — you need to check this out

We just launched @fifteenth_tax's new Resource Center with:

✅ Webinars on tender offers & stock options
✅ Deep dives on QSBS & RSU taxation
✅ Practical insights for tech professionals

[Ankur @ankurd]

@dnlkwk @Austen 100% agreed. We are doing 0->1 at https://t.co/y3WeCZjWzl - started with zero clients and already serving hundreds across top tech startups!

[Ankur @ankurd]

The agents are starting to work real well 👀

[Jonathan Gorard @getjonwithit]

Calling c the "speed of light" completely misses the point. Rather, c is the "spacetime exchange rate": how many units of space you can exchange for one unit of time.

In actuality, everything travels at the "speed of light", just not necessarily through space alone... (1/4)