---
title: c15t vs Klaro!
description: Compare c15t with Klaro! for service-based consent, Google Consent
  Mode, backend records, and framework integration.
lastModified: "2026-06-15T14:17:11-07:00"
lastAuthor: Christopher Burns
---
[Klaro!](https://klaro.org/docs/) is an open-source consent manager for
third-party apps and services. Its JavaScript API exposes a `ConsentManager`
that can read, save, apply, and reset choices. Its docs also cover
[Google Tag Manager and Consent Mode v2](https://klaro.org/docs/tutorials/google_tag_manager).

c15t is the better starting point when consent needs to live in JavaScript,
React, Next.js, and the backend. Klaro! is useful when the main job is managing
named third-party services on a script-tag site.

> ⚠️ **Warning:**
> Consent tooling does not guarantee legal compliance by itself. Your policies, disclosures, vendor list, regional behavior, and record-keeping still need to match your legal requirements.

## Why c15t wins here

* c15t gives JavaScript, React, and Next.js teams one consent model.
* c15t supports server-visible consent state through hosted, self-hosted, or
  custom backend modes.
* c15t includes policy packs for regional behavior instead of leaving all policy
  logic in app-owned configuration.
* c15t supports script, iframe, and network control from the same platform.
* c15t keeps the door open for durable records, generated docs, and IAB TCF.

## Comparison

|Area|c15t|Klaro!|
|--|--|--|
|Primary shape|Developer-first consent platform|Service and purpose consent manager|
|Framework support|First-class JavaScript, React, and Next.js packages|Script-first setup or custom wrappers|
|Backend records|Hosted or self-hosted records|Client storage unless extended|
|Policy handling|Policy packs and backend state|App-owned purpose and service config|
|Script control|Loader, iframe blocker, network blocker, and integrations|Configured apps and services|
|SSR awareness|Available through c15t framework packages|Client-side by default|

## Bottom line

Start with c15t for traditional JavaScript sites too. Service management is only
one part of consent, and c15t keeps consent ready for frameworks, backend
records, server-side state, regional policy, and future compliance workflows.

See the full overview in [Compare c15t](/docs/comparison).