London-based Stacker, which offers no-code tools to build business apps, raises $20M Series A led by a16z, bringing its total funding to $23M
No code platforms have developed into a hot market, and Stacker, a London-based no-code platform is attempting to bring the concept to a new level.
Context & Ripple Effects
Stacker's $20M Series A puts Andreessen Horowitz behind a London no-code startup just as the city reclaims its crown: Dealroom reports London overtaking Paris as Europe's leading tech hub and now ranking fourth globally. The round extends a pattern of US capital underwriting London startups across categories — the same city is set to host robotaxi launches from both Waymo and Baidu in 2026.
The no-code angle matters because of what these apps sit on top of: Stacker lets business teams build internal apps against their existing SaaS data, which makes integration plumbing the dependency. That layer is getting its own funding — StackOne raised a $20M GV-led Series A to integrate SaaS products and AI agents with enterprise systems.
First-order effects
- Stacker gains a war chest and a16z's network to push its no-code app-builder deeper into enterprise accounts, while a16z secures an early position in Europe's no-code market at a $23M total raise.
Second-order effects
- As no-code builders proliferate, the integration layer becomes the battleground: platforms like StackOne that connect SaaS data and AI agents to enterprise systems capture value regardless of which app builder wins.
- Enterprise buyers get a cheaper path to internal tooling without engineering headcount, shifting budget away from bespoke development toward subscription platforms.
Third-order effects
- If US funds keep anchoring European no-code and workflow startups, London's hub position compounds — more of these companies can scale locally instead of relocating to the Bay Area, reinforcing its fourth-place global ranking.
- App creation drifting from developers to operations teams structurally elevates whoever owns the data-integration chokepoint beneath those tools.
The trend: US venture capital is increasingly bankrolling European low-code and workflow-tooling startups out of London as the city consolidates its lead over Paris as Europe's top tech hub.