# Meticulous

> Meticulous is a London-based developer-tools company that records real interactions with web applications, turns them into a continuously evolving suite of end-to-end tests, and replays the relevant flows on every pull request. Its pitch is less test authoring, less maintenance and fewer flaky results; its evidence comes from engineering teams at Notion, Dropbox, LaunchDarkly, Engine, ElevenLabs and Wiz.

- **Founded:** 2021
- **Headquarters:** London, United Kingdom
- **Founders:** Gabriel Spencer-Harper (CEO and Co-founder), Quentin Spencer-Harper (CTO and Co-founder)
- **Team size:** Approximately 27-30 employees in 2026; the company said it intended to grow from roughly 20 to 30-40 over the following year.
- **Products:** Meticulous automated frontend testing, Deterministic browser replay, CI and code-host integrations
- **Notable:** Raised a $15 million Series A led by Chemistry with participation from Menlo Ventures in July 2026., Reported 5x annual recurring revenue growth in the year before its Series A., Reported testing more than 90,000 pull requests and 1.5 billion snapshots each month.

## Products & services

- **Meticulous automated frontend testing** — A SaaS platform that records developer or user sessions, maps them to code paths, curates relevant end-to-end flows, replays them against pull requests and surfaces visual, behavioral and logical differences.
- **Deterministic browser replay** — A Chromium-based execution engine that saves and replays network responses and controls scheduling to reduce side effects, changing data and flaky results.
- **CI and code-host integrations** — Pull-request testing through GitHub, GitLab and Vercel integrations, with support for other CI providers and major frontend frameworks including React, Vue, Angular, Svelte and Next.js.

## Achievements

- Raised a $15 million Series A led by Chemistry with participation from Menlo Ventures in July 2026.
- Reported 5x annual recurring revenue growth in the year before its Series A.
- Reported testing more than 90,000 pull requests and 1.5 billion snapshots each month.
- Named to the 2025 AI Disruptors 60 list and Redpoint's 2026 InfraRed 100.
- LaunchDarkly reported an 80% reduction in major frontend incidents after adoption.
- Engine estimated more than 250 engineering hours saved per month and 93% developer satisfaction.
- Notion reported 5-10 bugs caught per week and coverage of 70% of its most critical frontend functionality.

## Latest updates

- **2025-01** — Published Quentin Spencer-Harper's testing lessons from a decade working on large frontend systems at Palantir.
- **2025-12** — Added a redesigned changelog sidebar and the ability to export change diffs as GIFs.
- **2026-05** — Named to Redpoint's 2026 InfraRed 100 list for AI infrastructure startups.
- **2026-07** — Raised a $15 million Series A, reported 5x ARR growth and announced plans to expand into backend and performance testing.
- **2026-07** — Said it would build its US go-to-market presence and grow headcount while keeping the team comparatively small.

## Links

- Website: https://www.meticulous.ai
- LinkedIn: https://www.linkedin.com/company/alwaysmeticulous/
- Twitter/X: https://twitter.com/meticulousgabe
- GitHub: https://github.com/apps/alwaysmeticulous

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Profile page: https://yespress.io/meticulous
Published by YesPress — https://yespress.io
Last updated: 2026-08-22