# Dari

> Dari (YC F25) is a San Francisco startup building an API for reliable browser-use agents. Instead of calling an LLM on every run - which makes most browser agents slow, expensive, and non-deterministic - Dari learns a web workflow once, then caches the deterministic DOM steps so it can replay them reliably. It auto-handles 2FA (SMS codes, TOTP, email verification), detects when a site changes and adapts with AI, and exposes each automation as a versioned, stateful API endpoint. Founded by Caltech CS grads Avyay Varadarajan and Benjamin Hong.

- **Founded:** 2025
- **Headquarters:** San Francisco, California, United States
- **Founders:** Avyay Varadarajan (Co-founder & CEO), Benjamin Hong (Co-founder & CTO)
- **Team size:** 2
- **Products:** Dari browser-agent API, 2FA auto-handling, Adaptive re-planning & caching, Versioned, stateful endpoints
- **Notable:** Accepted into Y Combinator's Fall 2025 (F25) batch., Publicly launched an API for reliable browser-use agents in 2025., Early user (an AI voice company) reported saving 10+ hours per week on data entry and form filling.

## Products & services

- **Dari browser-agent API** — An API to build reliable browser-use agents. Learns a workflow once, caches the deterministic DOM steps, and replays them reliably; falls back to AI only when a site changes.
- **2FA auto-handling** — Automatically handles SMS text codes, TOTP authenticators, and email verification so authenticated workflows can be automated end-to-end.
- **Adaptive re-planning & caching** — Detects when a target site's DOM changes, re-plans the path with AI, then caches the new deterministic path to avoid repeat failures.
- **Versioned, stateful endpoints** — Turns an agent project into a versioned, stateful API endpoint with durable sessions and chat-to-automation authoring, triggerable via POST requests and webhooks.

## Achievements

- Accepted into Y Combinator's Fall 2025 (F25) batch.
- Publicly launched an API for reliable browser-use agents in 2025.
- Early user (an AI voice company) reported saving 10+ hours per week on data entry and form filling.

## Latest updates

- **2025-09** — Reported seed funding and inclusion in YC's Fall 2025 batch.
- **2025-10** — Public launch: 'the easiest way to build reliable browser-use agents,' with 2FA handling and DOM-step caching.

## Links

- Website: https://dari.dev
- LinkedIn: https://www.linkedin.com/company/usedari
- Twitter/X: https://x.com/avyvar

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Profile page: https://yespress.io/dari-dev-yc-f25
Published by YesPress — https://yespress.io
Last updated: 2026-07-31