AI Investors in London (2026): Who Is Backing Early-Stage Startups

The main London investors backing early-stage AI startups in 2026 include Concept Ventures, Air Street Capital, AI Seed, Seedcamp, MMC Ventures and Backed VC, covering everything from pre-seed to Series A.

Researched and written by Zeeshan Ali at Platvix. Updated October 2026.

TL;DR

• Raising pre-seed? Concept Ventures makes new investments only at pre-seed, and Seedcamp and Backed VC both write first cheques.
• Building an AI-first company? Air Street Capital and AI Seed invest only in AI.
• Raising seed or Series A? MMC Ventures backs AI companies at both stages, and Air Street can write cheques of up to $15m.

Pre-seed and seed AI investors in London

Concept Ventures

A London venture firm that makes new investments only at pre-seed, often as a founder's first institutional cheque, and follows on in later rounds.

• Invests in: pre-seed companies across the UK and Europe
• Cheque size: up to $1.5m, with around $1m per deal on average
• AI startups backed: ElevenLabs at pre-seed, and VSim, which builds simulation technology for robots
• Latest fund: Fund II, $88m, closed September 2025, to back up to 50 companies
• Website: concept.vc

Air Street Capital

A London firm that invests only in AI-first companies, run by Nathan Benaich.

• Invests in: AI-first companies in Europe and North America, leading early-stage rounds
• Cheque size: $500,000 to $15m for early-stage rounds (and up to $25m for select growth investments)
• AI startups backed: Synthesia, Black Forest Labs and ElevenLabs
• Latest fund: Fund III, $232m, announced March 2026
• Website: airstreet.com

AI Seed

A London venture firm that invests only in AI companies, founded in 2017.

• Invests in: AI companies at pre-seed, seed and Series A in Europe, the US and Asia
• Cheque size: not disclosed. It writes first cheques and follow-on investments, often as lead investor
• AI startups backed: 9fin, now valued at more than $1bn, from its first fund
• Latest fund: Fund II, $50m, launched in autumn 2026 and still open to new investors, to back 40 AI companies over four years
• Website: aiseedfund.com

Seedcamp

One of Europe's best-known first-cheque investors, based in London.

• Invests in: pre-seed and seed, with a growing focus on AI, science and the physical world
• AI startups backed: Dust, an AI agent platform
• Latest fund: Seedcamp VII, $220m, announced June 2026, alongside a $100m fund for follow-on rounds
• Website: seedcamp.com

MMC Ventures

A London investor that has backed European technology companies for more than 20 years, with a large enterprise AI portfolio.

• Invests in: seed and Series A, across enterprise AI, fintech, data-driven health and data infrastructure
• AI startups backed: Synthesia and Signal AI, and formerly Peak AI, and Stanhope AI, a UCL and King's College London spinout building brain-inspired AI, which MMC first backed in 2024 and followed on in its $8m seed round in February 2026
• Website: mmc.vc

Backed VC

A London seed fund that leads pre-seed and seed rounds in frontier technology.

• Invests in: pre-seed and seed, with AI therapeutics among its three focus areas
• Cheque size: $500,000 to $5m
• Latest fund: Backed 3, $100m, closed November 2025
• Website: backed.vc

Also worth knowing

LocalGlobe, a London seed investor, took part in the $13m seed round in Marker, led by Index Ventures. Marker is a London AI writing startup co-founded by a former DeepMind creative lead (July 2026).

FAQ

Which London VCs invest only in AI?

Air Street Capital and AI Seed both invest only in AI companies. MMC Ventures has a large enterprise AI portfolio alongside fintech and health.

Who leads pre-seed rounds in London?

Concept Ventures aims to lead more than 90% of its rounds, and Backed VC leads pre-seed and seed rounds.

Do I need to be based in London?

No. Concept Ventures and Seedcamp invest across the UK and Europe, Air Street invests in Europe and North America, and AI Seed invests in Europe, the US and Asia.

How were these investors chosen?

We included London investors that invest at pre-seed, seed or Series A, focus on AI or have backed AI startups, and have announced a fund or deal recently. Every fact links to the firm's own announcement or to business press.

How do I find which London investors fit my startup?

Platvix is an investment intelligence platform for founders. It supports your fundraising journey by helping you refine your pitch deck and find the capital options most relevant to your startup, based on what each investor says it backs and what it has done recently.

Where to go from here

• Browse our pre-seed investor list
• How to get warm investor introductions without a network
• The 10 slides your pre-seed pitch deck needs
• What investors look for in AI startups
• How to pitch an AI startup
• AI investors in the North East
• AI investors in Manchester

Find the London investors most likely to back you

London has a lot of early-stage investors, so the hard part is knowing which ones fit your startup. Platvix researches which firms are likely to back a company like yours, based on what each firm says it invests in and what it has been doing lately.

• Investor research across each firm's stated thesis, recent deals and fund announcements, kept up to date
• A targeted investor list built against your startup's stage, sector and location
• Deck analysis that reads your pitch the way an investor would
• Claims verification that checks the numbers in your deck before an investor does

Run that research on your own startup before you start sending your deck.

Start your investor research →

Updated October 2026. If you run one of these funds and something has changed, get in touch.