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Irregular Expressions

irregex.vc Direct investor

Irregular Expressions is an early-stage venture fund founded by Jean Sini, investing in infrastructure, data, and machine learning startups. It is backed by a group of engineering and product leaders who provide advice and support to portfolio companies.

Irregular Expressions is a venture capital firm. It invests directly in companies, from pre-seed to seed, in infrastructure, data Engineering, AI and DevOps.

“We invest in startups enabling engineers to efficiently build and run products and systems at scale: Infrastructure, DevOps, AI, Machine Learning, Data Engineering, Security, Observability, Developer Productivity and Enablement.”

— Irregular Expressions, own website
Layer
Direct investor
Type
Venture capital
Stage
Pre-seed – Seed
Sectors
Infrastructure, Data Engineering, AI, DevOps, Security, Observability, Developer Productivity

Team, as Irregular Expressions publishes it

  • Jean Sini General Partner

Names and roles exactly as listed on irregex.vc. Nothing else about these people is recorded.

Co-invests most often with

Derived from portfolio pages both investors publish themselves: each pair below lists at least one company in common. 224 co-investors found.

  • Kima Ventures 7 shared companies: plakar.io, popsink.com, alpic.ai, bubble.io…
  • Motier Ventures 4 shared companies: plakar.io, twin.so, tsuga.com, fundamental.tech
  • Seedcamp 4 shared companies: plakar.io, prelude.so, popsink.com, wise.com
  • Glynn Capital Management, LLC 4 shared companies: wise.com, datarobot.com, cloudera.com, klaviyo.com
  • Depo Ventures 4 shared companies: bubble.io, nvidia.com, mongodb.com, ibm.com
  • Ballistic Ventures 4 shared companies: people.ai, datarobot.com, ibm.com, redhat.com
  • RTP Global 4 shared companies: datarobot.com, datadoghq.com, liveperson.com, recall.ai
  • IRIS Capital 3 shared companies: popsink.com, escape.tech, qovery.com
  • SignalFire 3 shared companies: bubble.io, frame.io, plural.sh
  • Sapphire Ventures 3 shared companies: criteo.com, datarobot.com, looker.com

and 214 more — the graph.

Where this comes from

Every fact above was read from a page Irregular Expressions publishes itself. Nothing is taken from third-party databases. Investment activity (deals, co-investors) is not yet recorded.

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Record 3098 · added 2026-09-03 · link last verified 2026-09-06 · confidence high

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