← Startups in London
London Open Source 9 startups

"Open Source" Startups in London

Every active London startup we index that carries the "Open Source" tag.

All startups in London → "Open Source" startups nationwide →
Last updated
2026-09-02
Hiring right now 0% 0 of 9
Open roles 0
City London

About "Open Source" startups in London

Our index currently lists 9 tech startups in London tagged "Open Source" — a city×tag slice of the live directory, not every "Open Source" company nationwide and not every London startup regardless of tag. 0% of this slice is hiring right now (0 of 9). Apply links on each profile go to the company's own site; we don't act as a middleman. "Open Source" startups in London include Convoy, Evidently AI, Graphify Labs, HelixDB, and Lightdash. Categories represented here: AI / ML, Dev Tools, and Analytics. YC batches in this slice: S21, S20, W23, and W22, among others. Widen the view anytime: all London startups at /startups/location/london, or every "Open Source" company nationwide at /startups/tag/open-source.

Convoy
Convoy
Webhooks Gateway for outgoing and incoming webhooks.
Developer ToolsB2BOpen Source
Open Jobs —
Team 8
Founded 2022
Evidently AI
Evidently AI
Open-source monitoring for machine learning models
Developer ToolsMachine LearningB2B
Open Jobs —
Team 2
Founded 2021
Graphify Labs
Graphify Labs
On-device knowledge graph engine for enterprises
Developer ToolsOpen Source
Open Jobs —
Team 2
Founded 2026
HelixDB
HelixDB
The fastest & most scalable graph-vector database on the market
Developer ToolsOpen SourceInfrastructure
Open Jobs —
Team 6
Founded 2025
Lightdash
Lightdash
The open source Looker alternative
Developer ToolsB2BAnalytics
Open Jobs —
Team 23
Founded 2020
QuestDB
QuestDB
High-performance time series database
Developer ToolsAnalyticsOpen Source
Open Jobs —
Team 30
Founded 2020
Trigger.dev
Trigger.dev
Build and deploy fully‑managed AI agents and workflows
Developer ToolsSaaSB2B
Open Jobs —
Team 9
Founded 2022
Unify
Unify
AI teammates for everyone else 🤖
Artificial IntelligenceProductivityOpen Source
Open Jobs —
Team 6
Founded 2022
Vibe Kanban
Vibe Kanban
Plan and review AI generated code
Artificial IntelligenceMachine LearningOpen Source
Open Jobs —
Team 10
Founded 2021
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Similar startups beyond London / Open Source

3 of 4 similar companies are hiring right now · most common: Engineering

PI
PipelineDB
Open-source time-series data analytics extension for PostgreSQL
Open SourceTime Series
Open Jobs —
Team 2
Founded 2013
InfluxData
InfluxData
The platform for building and operating time series applications.
AnalyticsOpen SourceTime Series
Open Jobs 4
Team 210
Founded 2012
↑ Trending
Supabase
Supabase
Build in a weekend. Scale to millions.
Developer ToolsOpen SourceBig Data
Open Jobs 57
Team 120
Founded 2020
PostHog
PostHog
The single platform to analyze, test, observe, and deploy new features
Developer ToolsB2BOpen Source
Open Jobs 11
Team 150
Founded 2020

Related startup slices

All startups in LondonEvery tag"Open Source" startups nationwideEvery city"Open Source" startups in San Francisco90 startups"B2B" startups in London38 startups"SaaS" startups in London34 startups"Fintech" startups in London32 startups"Artificial Intelligence" startups in London28 startups"AI" startups in London27 startups"Developer Tools" startups in London21 startups"Open Source" startups in New York City14 startups

Frequently asked questions

How many "Open Source" startups are in London?

Our index currently tracks 9 active tech startups in London tagged "Open Source". Counts move as scrapers discover new companies and flag shutdowns inactive.

Which "Open Source" startups are based in London?

Companies on this page include Convoy, Evidently AI, and Graphify Labs, plus 6 more below. Each profile links to the company's site and any open roles we scrape.

How is this different from the London startups page or the "Open Source" tag page?

/startups/location/london lists every indexed startup in London across tags. /startups/tag/open-source lists every "Open Source" startup nationwide. This page is the intersection — only companies that resolve to both London and "Open Source".

Are these London "Open Source" startups hiring?

0 of the 9 companies on this page currently have open roles in our jobs index.

How often is this list updated?

Automated scrapers refresh on the same daily cadence as the rest of the directory. The last index update was 2026-09-02.