Co-Founder/CEO @ Fifteenth (https://xitter.cf/t.co/GUOw9RmLtO) - taxes for tech people. Previously rippling, flexport, twitter, facebook
San Francisco
Joined February 2010
- Tweets887
- Following1.2K
- Followers558
- Likes2.4K
Ankur retweeted
Through the VOICE trial, Terry is using his Neuralink implant to help fine-tune a brain-to-voice interface for himself and others who can’t speak. He trained the algorithm first by miming speech as best he could, then by simply thinking the words and hearing them come out in his own natural voice.
Powered by Grok Voice from @spacexai
Ankur retweeted
This morning, I am thrilled to announce that Arca has officially emerged from stealth with $64 million in funding across our seed and Series A from @generalcatalyst , @IndexVentures , and @Venrock .
I started Arca because of a simple contradiction: the best wealth management is deeply personal, yet the industry becomes less personal as it scales.
We know great financial advisors don't just manage portfolios – they help clients navigate life's biggest, most emotional decisions. But most advisors are buried in administrative work, fragmented systems, and inefficient manual workflows, preventing them from doing their best work for their clients.
We believe more people deserve personalized, proactive and efficient wealth management. And advisors deserve to focus on what they do best: delivering great financial advice to their clients.
That's why Arca was born.
Arca is an AI-native wealth management company that is redefining how financial advice is delivered by pairing great financial advisors with a fully integrated, agentic platform. We’re building agents from scratch across every part of the business, creating an evolving and compounding system that learns from and operates itself, and pushing the boundaries of what’s possible in one of the largest industries in the world.
We're empowering advisors to do what only humans can do: cultivate trust and relationships, understand the full complexity of someone’s financial life, and make every client feel deeply seen and heard.
Thank you to our fantastic team for joining this journey; we would not be here without your efforts. We're building one of the most talent dense teams in NYC, and we're hiring across the board.
To our investors and board/advisors, I'm grateful for your belief and support in Arca and our vision of working tirelessly to enable better financial outcomes for people.
Learn more about Arca’s story in our WSJ exclusive: wsj.com/pro/private-equity/s…
Really cool to see love for @fifteenth_tax in the wild! 🙏
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 retweeted
👋 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.
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!)
Gemini 3 is a phenomenal model. Most of our evals went up by ~5% and are now >= human scores.
Thanks @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 retweeted
🚨 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 👇
Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning.
ALT Bar chart comparing software engineering accuracy between two versions of Opus 4. The first bar shows Opus 4 (May 2025) at 72.5% accuracy and the second bar shows Opus 4.1 (Aug 2025) at 74.5% accuracy.
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 retweeted
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!
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
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: fifteenth.com/resource-cente…
Ankur retweeted
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)
Ankur retweeted
What if April 15th were just another day?
@Ankurd and @LauraMoreno_CPA, founders of @fifteenth_tax, are transforming tax preparation for complex financial situations. Their platform identifies missed deductions, optimization opportunities, and planning considerations by analyzing your return.
Building what's essentially an AI-enhanced CPA firm for those of us (no comment) with complex tax situations.
Better taxes. No dread.
We backed them last year alongside @GeneralCatalyst, @A_StarVC (thanks to @GGuptaSF for the intro), and @SVAngel. We're proud of the work they've done applying AI to revolutionize an industry ready for change.
Forward logo still up on an abandoned building in SF. Feels like a warning sign to every healthtech founder walking by.
