# Andreessen Horowitz's Developer Tools Investments: 10 Startups in Its Portfolio (2026)

> The 10 Developer Tools startups Andreessen Horowitz has backed, by stage: $281M raised between them. From the rounds we track; updated nightly.

Source: https://millionrounds.com/portfolio-maps/andreessen-horowitz-developer-tools-portfolio (Millionrounds; every figure on the page links to its filing or article)

## Series A

3

- [Replay](https://millionrounds.com/company/replay)
- [Stainless](https://millionrounds.com/company/stainless)
- [Resend](https://millionrounds.com/company/resend)

## Series B

3

- [*G* Graphite](https://millionrounds.com/company/graphite)
- [Method Financial](https://millionrounds.com/company/method-financial)
- [Mintlify](https://millionrounds.com/company/mintlify)

## Stage not reported

2

- [Flexpa](https://millionrounds.com/company/flexpa)
- [Svix](https://millionrounds.com/company/svix)

## Pre-seed and seed

2

- [Radiant Entertainment](https://millionrounds.com/company/radiant-entertainment)
- [Estimote, Inc.](https://millionrounds.com/company/estimote-inc)

## Segment by segment

### Series A

3 startups · $111M raised

- [**Replay**](https://millionrounds.com/company/replay) Web3 video tracking and payments platform United States $68M
- [**Stainless**](https://millionrounds.com/company/stainless) Stainless is building the platform for high-quality, easy-to-use APIs United States $25M
- [**Resend**](https://millionrounds.com/company/resend) Resend is a developer-first email infrastructure platform founded in 2023, evolving from an open-source project started in 2022. United States $18M

### Series B

3 startups · $146M raised

- [*G* **Graphite**](https://millionrounds.com/company/graphite) United States $67M
- [**Method Financial**](https://millionrounds.com/company/method-financial) Method Financial is a financial connectivity API for consumer liability data + payments United States $42M
- [**Mintlify**](https://millionrounds.com/company/mintlify) Mintlify is an AI-native documentation platform designed to help companies create, host, and manage developer-facing documentation. United States $37M

### Stage not reported

2 startups · $16M raised

- [**Flexpa**](https://millionrounds.com/company/flexpa) Flexpa allows digital health apps to connect to new patient access APIs. United States $8.6M
- [**Svix**](https://millionrounds.com/company/svix) Svix is an open-source webhooks-as-a-service platform founded in 2021, designed to help companies send, receive, and test webhooks United States $7.8M

### Pre-seed and seed

2 startups · $7.9M raised

- [**Radiant Entertainment**](https://millionrounds.com/company/radiant-entertainment) Radiant Entertainment is an American video game developer that creates networking code software solutions. United States $4.5M
- [**Estimote, Inc.**](https://millionrounds.com/company/estimote-inc) Estimote, Inc. United States $3.4M

**How this map is made.** Every startup here works in Developer Tools and has raised money in a round we track that names Andreessen Horowitz as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026.

## More portfolio maps

[All portfolios](https://millionrounds.com/portfolio-maps)

[Sector portfolio **Andreessen Horowitz's AI portfolio** 259 startups · $426B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-ai-portfolio)[Sector portfolio **Andreessen Horowitz's Fintech portfolio** 90 startups · $24B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-fintech-portfolio)[Sector portfolio **Andreessen Horowitz's Web3 & Crypto portfolio** 63 startups · $7.9B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-web3-crypto-portfolio)[Sector portfolio **Andreessen Horowitz's IT Services portfolio** 44 startups · $1.4B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-it-services-portfolio)[Sector portfolio **Andreessen Horowitz's Big Data & Analytics portfolio** 42 startups · $3.1B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-big-data-analytics-portfolio)[Sector portfolio **Andreessen Horowitz's Biotech portfolio** 36 startups · $6.3B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-biotech-portfolio)

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