head to head · open source
effect vs kiali
effect has 16,138 GitHub stars, 752 forks, 253 open issues and last shipped today. kiali has 3,637 stars, 570 forks, 79 open issues and last shipped 2 days ago. effect leads on adoption by 344% (16,138 vs 3,637 stars). effect is written in TypeScript under MIT; kiali is written in Go under Apache-2.0. effect has attracted 5% as many forks as stars, kiali 16%. effect was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (observability), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 20902 open source comparisons
Side by side
| effect | kiali | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 3.6K |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-20 | 2026-09-18 |
| Forks | ⑂ 752 | ⑂ 570 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick effect if
- You weight community size — 16K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick kiali if
- You want the kiali feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Go
- You evaluated both and kiali fits your workflow better
About effect
Effect is a TypeScript library for building robust, maintainable, type safe, and production grade applications. It lives in the TypeScript and JavaScript ecosystem, distributed as the core effect package alongside a monorepo of integration packages that extend it. The project is MIT licensed, has been developed for roughly seven years, and currently ships Effect V4 as a release candidate, with the main branch holding v4 development and the v3 branch retaining the previous line.
read the full effect overview →
About kiali
Kiali is a management console and observability interface for Istio service meshes, aimed at developers who work on the project and at operators who run Istio on Kubernetes and OpenShift clusters.
read the full kiali overview →
More in Infrastructure & Operations
Related comparisons
More Monitoring & Observability projects
Compare either of these against the rest of the Monitoring & Observability field.
Frequently asked questions
Is effect or kiali more popular?
effect has 16,138 GitHub stars and kiali has 3,637. effect has the larger community by that measure.
Are effect and kiali free?
Both are open source. effect is licensed under MIT and kiali under Apache-2.0. Neither carries a licence fee.
What is the difference between effect and kiali?
effect is written in TypeScript and kiali in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, effect or kiali?
Choose effect if you want the larger community (16,138 stars) or its MIT licence terms. Choose kiali if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.