Index Ventures
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Investment Portfolio
Ineffable Intelligence lands over £800m in a seed round led by Sequoia and Lightspeed to develop superintelligence with reinforcement learning
Ineffable Intelligence is an AI research startup developing systems that learn from their own experience to discover new knowledge. It focuses on building a “superlearner” designed to advance reinforcement learning and scientific discovery.
Ankar lands a £15m Series A led by Atomico to shift how companies generate and protect patents
Ankar builds an AI platform that helps companies and law firms analyse inventions, draft patents and manage intellectual property through a single secure workflow.
Wordsmith AI raises £18.5m Series A led by Index Ventures to embed legal AI agents in enterprises
Wordsmith AI embeds AI legal agents within organisations, helping in-house teams manage contracts, queries and workflows while supporting new roles focused on training and deploying legal AI systems.
Ankar secures £3m seed round led by Index Ventures to redefine IP management with AI agents
Ankar develops AI agents that support the full patent lifecycle, helping inventors assess novelty, draft applications and monitor infringement using scientific and legal data.
Arondite raises £9m seed round led by Index Ventures to power safe human-machine collaboration in defence
Arondite builds software that connects autonomous systems like drones and sensors, giving defence teams a single interface to monitor and control operations safely.
Plain raises £12m Series A led by Battery Ventures to build the future of B2B customer support
Plain develops a collaborative B2B customer support platform that unifies email, chat and tools like Slack, enabling support, engineering and success teams to resolve issues faster using shared workflows and AI assistance.
More venture news
- 27 Apr 2026
Ineffable IntelligenceIneffable Intelligence lands over £800m in a seed round led by Sequoia and Lightspeed to develop superintelligence with reinforcement learning
SeedAI - 23 Apr 2026
DOJO AIDOJO AI lands a £4.4m seed round led by Armilar to unify marketing tools with its agentic platform
SeedMarketing - 21 Apr 2026
Exergy3Exergy3 raises a £10m seed round led by Axeleo Capital to convert renewable power into industrial heat
SeedEnergy
