Effect 2025 - Year in Review
Here’s a look back at what shaped Effect in 2025.
- Effect Days (🇮🇹 Italy) — the 3-day in-person conference dedicated to the Effect ecosystem and community, with 17 talks and 2 workshops.
- Global meetups across Paris, Hamburg, Berlin, NYC, Vienna, San Francisco, Munich, Milan, Sardinia, and Sondrio. Subscribe to our community events calendar for updates on future events.
- Effect Office Hours 🔥 — recurring live sessions with maintainers and the community.
- Cause & Effect podcast episodes with developers using Effect in production:
Alongside events and media, the Effect Discord community remained a constant: thousands of developers discussing real production problems, sharing experiences, helping each other, and shaping the direction of the ecosystem day-to-day.
This year, Mattia Manzati and Kit Langton joined the team, strengthening both ecosystem tooling and learning content. 🎉
- Effect AI SDK, bringing first-class abstractions for AI-native and agent-based systems
- Developer too ling: Effect LSP, VS Code / Cursor Extension.
- effect/workflow (alpha) — durable, orchestrated workflows built on Effect’s runtime
- effect-atom — a reactive state management library for Effect.
- Visual Effect & Effect Solutions by Kit Langton.
- Effect Institute launched and is currently in progress, with a focus on structured learning and long-term skill building. Join the dedicated channel on the Discord community to follow updates closely.
- Docs search functionality substantially improved, thanks to a better search experience powered by Mixedbread
- Lucas Barake’s course: Practical Effect
- Some of the companies adopting or publicly using Effect this year include OpenRouter, Warp, Edge & Node, Polar, Salesforce DevTools, T3 Chat, Vercel Domains, and Effect also landed inside the 𝕏 (Twitter) codebase.
- Effect trended on GitHub 📈🚀, surpassed 6 million npm downloads per week, and crossed 12,000 GitHub stars — milestones we’re grateful for and that reflect sustained use.
Effect YouTube content series:
- Contentlayer with Effect
- Building ChEffect with LiveStore
- Effect Warehouse app
- Twitch–Spotify integration
- Effect MCP
- API Integration for Google
- Effect AI SDKs Refactor
Featured across major platforms:
- Mentioned in the Thoughtworks Technology Radar Vol 32 in the Languages and Framework section, with the Thoughtworks team highlighting that after using Effect, their team found no reason to go back.
- Matt Pocock’s video on why Effect “captured his heart”
- Build Production-Ready AI Agents with TypeScript Effect & Amazon Bedrock with James Ward & Maxwell Brown
- devtools.fm with Maxwell Brown
- This library changed my life, it had such a big Effect on me, Livestream with Kit Langton and TeeJ
- Effect: the Good Parts,
use workflow, and Vercel Domains w/ Dillon Mulroy & Swyx - Building AI applications with Effect + Netlify with Maxwell Brown
- We ended the year with a Christmas gift from the terminal.shop for the Effect community, which we’ll use to give back and support community-led initiatives.
- And, of course… justfuckinguseeffect.dev — probably our most honest CTA to date. 😄
2026 will be about continuing the work: improving the core, expanding the ecosystem, and supporting production use.