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Coral

Freemium#2 of 18 in Commenting Systems

Coral: A publisher-focused commenting system with flexible deployment and detailed moderation controls. Ranked #2 of 18 in Commenting Systems by our editors (9.2/10); pricing: Free plan · pricing on request; best for publishers needing open, deeply controlled moderation.

9.2/10Editor score

Visit Coral

Coral9.2 Visit Coral

At a glance

Editor score
9.2 / 10
Pricing
Free plan · pricing on request
Best for
Publishers needing open, deeply controlled moderation
Free plan
Yes
Moderation tools
Ai_assisted
Facts checked
24 Sep 2026

Where it wins
- Moderation queues, pre-moderation and configurable word lists
- Cloud or self-hosted deployment, with optional AI and spam screening
- JWT sign-on, reactions, notifications and a GraphQL admin API
Where it doesn't
- Hosted service pricing is quote-based
- AI toxicity screening requires the optional Perspective API
- Email notifications require a configured SMTP provider

Our verdict on Coral

Coral gives publishers and newsrooms an embeddable comment stream for hosting discussions on their websites. It pairs moderation tools with commenter features such as reactions, discussion sharing and notifications, and supports connecting an existing registration system. Its open-source software can be self-hosted, while a hosted service is also available. That makes it a fit for teams that want control over deployment and comment policies, rather than a lightweight commenting add-on with little moderation depth.

Moderation is a central strength: teams can work across reported, pending, unmoderated, approved and rejected queues, apply pre-moderation, use recent-history controls, and configure banned or suspect word lists. Optional toxicity screening uses Perspective API, and optional spam screening uses Akismet. Coral also includes a Respect reaction and configurable custom reactions. These controls suit publishers handling active discussions, although AI screening depends on an external service rather than being a standalone Coral capability.

Deployment and integration choices are another important distinction. Self-hosted Coral is free under Apache 2.0; this is free software, not a vendor-hosted $0 plan. Hosted SaaS is offered by quote, so teams evaluating a managed deployment will need to contact sales. JWT-based single sign-on connects to an existing identity setup, email notifications use a configured SMTP provider, and the GraphQL API supports authenticated administrative access. Pick Coral if moderation depth, extensibility and hosting control matter; consider alternatives if you need publicly priced hosted plans or do not want to manage self-hosting and connected services.

Your product? Our editors can test Coral in depth and publish a review, labelled as paid · from $149/mo →

Coral pricing

Plans Free plan · pricing on requestFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 24 Sep 2026.

See plans on coralproject.net

Coral fact sheet

Free plan	Yes
Paid from	Not verified
Moderation tools	Ai_assisted
SSO support	Yes
Spam filtering	Yes
Comment reactions	Yes
Email notifications	Yes
Site limit	Not verified
API access	Yes
Deployment	Cloud, Self-hosted
Platforms	Web
Compliance & security	GDPR, SSO/SAML
Support	Email, Tickets, Community, Docs
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	4 integrations: Perspective API, Akismet, JWT-based single sign-on, SMTP providers
Pricing	Free plan · pricing on request (source)
Website	coralproject.net
Facts checked	24 Sep 2026

Coral integrations

Coral lists 4 integrations on its own site.

Perspective API
Akismet
JWT-based single sign-on
SMTP providers

Alternatives to Coral

See all Coral alternatives →

Coral vs the competition

Compare Coral with any tool side by side →

Used Coral? Be the first to review it

The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Coral for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Coral is listed in our Commenting Systems directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update