AI & ML · San Francisco
Nimbus AI
Agents that run back-office operations end to end.
- Stage
- Series B
- Founded
- Founded 2019
- First invested
- We invested 2020
- Team
- 73 people
- Board
- Board seat
- Total raised
- $62M
- Current stage
- Series B
- Team
- 73
- Founded
- 2019
What they build
The product, in plain terms
Nimbus AI builds agents that run back-office operations end to end. The company started in San Francisco in 2019. We backed it at seed and have worked with the team through Series B.
- 01
A model layer trained on the customer's own history of decisions, not a general base model with a prompt wrapped around it.
- 02
An evaluation harness that runs before anything ships, so the team can prove a change made the output better rather than different.
- 03
Human review built into the product from the start, because the first buyers will not accept an unsupervised system.
Where it stands
Numbers the team watches
Reported by the company at its most recent board meeting. We publish what founders are comfortable publishing and nothing more.
- Tasks handled monthly
- 18.3K
- Accepted without review
- 88%
- Median time saved
- 4 weeks
Why we invested
The note from the first meeting
“We met Nimbus AI in 2020, back when most buyers had already been burned by a pilot that never left the pilot. What convinced us was not the deck. It was that they answered every hard question with a number and admitted the two they could not answer yet.”
- Shipped the enterprise tier without hiring a single sales engineer.
- Turned down an acquisition offer in year two and was right to.
- Rebuilt pricing twice and doubled contract value both times.
Founders
Who is building it
Both founders were in the room the day we wrote the check, and both still run the company.
Noah Costa
Co-founder and CEO
Spent six years as a customer of the tools they now compete with.
Priya Iyer
Co-founder and CTO
Ran the team that owned this problem inside a company large enough to feel it properly.
Timeline
How it has gone
The version we would give another investor, including the years where nothing looked like progress.
- 2019
Founded
Noah Costa and Priya Iyer start Nimbus AI in San Francisco around a single wedge: agents that run back-office operations end to end.
- 2020
We invested
We wrote the seed check and took a board seat. David Chen has worked with the team ever since.
- 2021
Paid customers
Contracts replaced pilots, and the company stopped selling a roadmap and started selling a product.
- 2022
Series B round
Raised at $480M, led by an investor we introduced during diligence. We took our full pro rata.
- 2026
Where it stands
73 people, selling in more markets than it started in, still run by the two people who wrote the first version.
Alongside us
Co-investors
We share rounds with people we would want on our own cap table.
- Matrix
- Uncork Capital
- Kleiner Perkins
- Amplify Partners
Working here
Open roles
Nimbus AI is hiring in these areas. Mention us and the note gets to the founders directly.
- Applied research
- Forward deployed engineering
- Enterprise sales
Building something next to Nimbus AI?
We are usually early to a category and happy to be early again. Send us the short version.