13 Developer Tools companies in New York.
By the Numbers
Funding
Vellum
New York
Vellum builds a platform that lets anyone describe a goal in plain language and generate reliable agents in seconds, enabling non-engineering teams such as Sales, Ops, Marketing, and Finance to overcome inefficiencies.
Fern
Fern helps software companies build an API experience; founded in 2022 and headquartered in Williamsburg, Brooklyn, it develops open-source software with a small team, backed by Bessemer Venture Partners and Y Combinator, and was acquired b
Svix
Svix positions itself as 'SendGrid for webhooks', a growing startup building server-to-server communications; backed by Y Combinator, Aleph, and a16z, with customers including Brex, Lob, Benchling, Drata, and Fortune 500, and a distributed
Cotera
Cotera is building an AI automation platform for businesses, initially targeting Customer Experience teams. Led by founder Tom Firth, the eight-person company has a four-person technical team with engineers in London and New York and a data
Avenue
Avenue is an observability platform for operations teams that lets business units set up alerts from databases or data warehouses, aiming to be the Datadog/PagerDuty equivalent. Founded by Justin Bleuel (CEO) and Jeff Barg (CTO) with $4M in
Hiro Systems
Hiro Systems builds developer tools for Bitcoin L1 and Stacks L2, enabling developers to build on these networks while contributing to Stacks’ infrastructure and libraries to strengthen the ecosystem. Headquartered in New York City with a d
Type
Type.ai is an AI-native document editor and writing tool that helps people communicate confidently. Backed by Y Combinator, the Brooklyn-based startup serves thousands of customers with AI-powered editing that helps individuals and teams wr
Hatchet
Hatchet offers a platform to distribute and manage background tasks and workflows for developers, delivering a simple, powerful, reliable solution so builders can focus on apps. A YC-alumni-founded startup, it targets scaling challenges lik
Cerebrium
Cerebrium is a serverless infrastructure platform for building and scaling data and AI workloads, with core components for performance. Backed by Gradient Ventures and Y Combinator, it serves AI teams from Seed to Series-C and has millions
Ploomber
Ploomber is a New York cloud platform that helps companies deploy and scale AI apps, often called Heroku for AI. Hosted on AWS, it uses Python for open-source framework, and its founders bring AWS experience and YC Winter 2022 status.
Ellipsis
Ellipsis is an AI developer tool that automatically reviews code and fixes bugs, adopted by hundreds of companies to accelerate shipping, with a mission to build an AI software engineer and to leverage LLMs for asynchronous, real-world comp
Flowglad
Flowglad is a New York–based payments layer for apps programmable in natural language, marketed as the easiest way to make internet money. Founded in 2025, it operates with a five-person team; co-founder Ahmed and Harrison Telyan (NUMI.tech
Spur
Spur provides AI-powered QA and testing automation for websites, helping fast-growing teams accelerate delivery. Founded by Yale alumni ex-Figma and DeepMind engineers, it is backed by First Round, Neo, Pear VC, Conviction, and Y Combinator
