Best Open Source Alternatives to Customer.io

Compare the best free and open-source alternatives to Customer.io — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 1 alternatives

Customer.io

Proprietary SaaS

Customer.io alternatives compared

Open-source alternatives to Customer.io, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Wraps	66	—		No	Nov 2026	Visit

Top open-source Customer.io alternatives

Wraps66

Wraps replaces hosted email APIs like Resend with in-account Amazon SES infrastructure, offering typed React templates and direct cloud throughput.

vs Customer.io: a free, open-source option you fully control.

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EasyP

Promoted

The modern standard for Protobuf workflows

Lint, codegen, breaking-change checks and dependency management in one Git-native CLI. Open source, no registry lock-in.

lintgeneratebreakingeasyp.lock

go · ts · java generated

$ easyp breaking

backward compatible