What they do:
Foundational model of human societies for consequential decisions
Quick facts:
HQ: London, United Kingdom
Top B2B Software Startups in London
This list has 146 startups and was last updated on Oct 16, 2026. 41 of them are hiring right now. Largest teams: Permutive, Model ML, and Prolific. Latest round: Sava raised €32.1M (Oct 9, 2026).
146 startupsPage 2 of 5
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
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HQ: London, United Kingdom
Happl
Hiring
What they do:
Your personalised benefits and engagement platform for global teams
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HQ: London, United Kingdom
What they do:
Create video by chatting to AI
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HQ: London, United Kingdom
Diligent
Hiring
What they do:
AI agents for fintech risk and compliance operations
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HQ: London, United Kingdom
Alguna
Hiring
What they do:
AI-Native CPQ & Billing for Modern Pricing Models
Quick facts:
HQ: London, United Kingdom
SAMMY Labs
Hiring
What they do:
Computational Law
Quick facts:
HQ: London, United Kingdom
Zalos
Hiring
What they do:
Hire Zalos AI workers to run your finance department
Quick facts:
HQ: London, United Kingdom
What they do:
AI Lead Generator
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HQ: London, United Kingdom
What they do:
First API solution for tax returns.
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HQ: London, United Kingdom
Aglide
Hiring
What they do:
Connect every disconnected app to your SSO.
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HQ: London, United Kingdom
What they do:
AI compliance co-pilot for regulated financial businesses
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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:
In-store analytics AI assistant to fix your retail stores
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HQ: London, United Kingdom
What they do:
Plan and review AI generated code
Quick facts:
HQ: London, United Kingdom
Autumn
Hiring
What they do:
Billing infrastructure for AI
Quick facts:
HQ: London, United Kingdom
What they do:
AI based Customizable Subscription & Revenue Management Platform
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HQ: London, United Kingdom
What they do:
No-code Browser RPA
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HQ: London, United Kingdom
Hirebolt
Hiring
What they do:
AI engineering capacity. Made simple. ⚡️
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HQ: London, United Kingdom
What they do:
Webhooks Gateway for outgoing and incoming webhooks.
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HQ: London, United Kingdom
What they do:
We deliver toll-free internet apps
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HQ: London, United Kingdom
Leeroo
Hiring
What they do:
Organizational Superintelligence
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HQ: London, United Kingdom
What they do:
AI Coworker for Accountants
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HQ: London, United Kingdom
What they do:
Unlocking the world’s most valuable data for frontier AI.
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HQ: London, United Kingdom
Smooth
Hiring
What they do:
Fast, simple, reliable AI browser agent
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HQ: London, United Kingdom
Plexe
Hiring
What they do:
Open-source agents to build predictive ML models from a prompt
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HQ: London, United Kingdom
What they do:
The AI Associate for Litigation Lawyers
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HQ: London, United Kingdom
What they do:
Accounting software that works for you
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HQ: London, United Kingdom
What they do:
Voice AI for Automotive
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HQ: London, United Kingdom
What they do:
AI Agents for Advisory & Financial Services.
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HQ: London, United Kingdom
What they do:
Understand why your AI agent breaks. Iterate fast to fix it.
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HQ: London, United Kingdom
What they do:
The fastest & most scalable graph-vector database on the market
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HQ: London, United Kingdom
Sparkles
Hiring
What they do:
Make everyone on your team an engineer
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