Verto
Hiring
What they do:
Cross-Border Payments and FX Simplified
Quick facts:
HQ: London, United Kingdom
Top Developer Tools Startups in the United Kingdom
This list has 40 startups and was last updated on Oct 15, 2026. 9 of them are hiring right now. Largest teams: Verto, Duffel, and zeroheight.
40 startupsPage 1 of 2
Duffel
Hiring
What they do:
The complete toolkit to sell travel.
Quick facts:
HQ: London, United Kingdom
What they do:
The design system layer for coding agents
Quick facts:
HQ: London, United Kingdom
Lightdash
Hiring
What they do:
The open source Looker alternative
Quick facts:
HQ: London, United Kingdom
What they do:
Speed up non-coding tasks for engineering teams
Quick facts:
HQ: London, United Kingdom
Junction
Hiring
What they do:
API for at-home health data
Quick facts:
HQ: London, United Kingdom
What they do:
Social Infrastructure for Games; Makers of Nakama game server, Satori…
Quick facts:
HQ: London, United Kingdom
Meticulous
Hiring
What they do:
Automated e2e screenshot testing without writing or maintaining tests
Quick facts:
HQ: London, United Kingdom
What they do:
Card issuer processor and banking stack for businesses in Sub-…
Quick facts:
HQ: Rotherham, United Kingdom
What they do:
Build and deploy fully‑managed AI agents and workflows
Quick facts:
HQ: London, United Kingdom
Cosine
Hiring
What they do:
Fully Agentic SWE
Quick facts:
HQ: London, United Kingdom
cubic
Hiring
What they do:
AI-powered code review platform
Quick facts:
HQ: London, United Kingdom
Parsewise
Hiring
What they do:
Multi-document processing for your risk teams, AI agents, pipelines
Quick facts:
HQ: London, United Kingdom
What they do:
Plan and review AI generated code
Quick facts:
HQ: London, United Kingdom
What they do:
Webhooks Gateway for outgoing and incoming webhooks.
Quick facts:
HQ: London, United Kingdom
What they do:
Understand why your AI agent breaks. Iterate fast to fix it.
Quick facts:
HQ: London, United Kingdom
What they do:
The fastest & most scalable graph-vector database on the market
Quick facts:
HQ: London, United Kingdom
QuestDB
Hiring
What they do:
Data platform for mission-critical real-time workloads
Quick facts:
HQ: London, United Kingdom
YC S20Early stage
What they do:
Turns spreadsheets into internal apps and customer portals
Quick facts:
HQ: London, United Kingdom
What they do:
Models that keep learning
Quick facts:
HQ: London, United Kingdom
What they do:
AI agent that optimizes inference for embedded compute like Jetson
Quick facts:
HQ: London, United Kingdom
What they do:
Monitor and fix product privacy issues before they block growth
Quick facts:
HQ: London, United Kingdom
What they do:
Swarms of agents acting like users to find bugs before release
Quick facts:
HQ: London, United Kingdom
What they do:
Open-source monitoring for machine learning models
Quick facts:
HQ: London, United Kingdom
What they do:
AI SRE For Teams on Kubernetes
Quick facts:
HQ: London, United Kingdom
What they do:
No Code Data Analysis for Life Science Research
Quick facts:
HQ: London, United Kingdom
What they do:
ideate.xyz is an AI-powered 3D art suite on the web
Quick facts:
HQ: London, United Kingdom
What they do:
Persistent email inbox, phone number and secret storage for agents
Quick facts:
HQ: London, United Kingdom
What they do:
Grammarly for Math ✏️
Quick facts:
HQ: London, United Kingdom
What they do:
Experiment tracking for training ML models
Quick facts:
HQ: London, United Kingdom
What they do:
Agent swarms that make long-running tasks exponentially faster
Quick facts:
HQ: London, United Kingdom
Versori
Acquired
What they do:
Agentic integrations & automations for enterprise
Quick facts:
HQ: Manchester, United Kingdom
Vizzly
Acquired
What they do:
Customer-Facing Analytics for Modern SaaS.
Quick facts:
HQ: London, United Kingdom
Shuttle
Shut down
What they do:
Build Backends. Fast.
Quick facts:
HQ: London, United Kingdom
Atla
Shut down
What they do:
The improvement engine for AI agents
Quick facts:
HQ: London, United Kingdom
CodeStory
Shut down
What they do:
Aide is an AI-native , privacy-first IDE built on top of VSCode
Quick facts:
HQ: London, United Kingdom
Questions and answers
How many startups are on this list?
There are 40 startups on this list, last updated on Oct 15, 2026.
Which of them are hiring?
9 of them are hiring right now, including Verto, Duffel, and Lightdash.
Which of them have the largest teams?
By team size: Verto (170 employees), Duffel (55 employees), and zeroheight (55 employees).