Adding a comment section used to mean one obvious choice: drop in a Disqus embed and move on. It's been the default for over a decade, which is exactly why it's also the one most people eventually want to replace — between the ads, the tracking scripts, and the "encumbered" feel long-time users describe. cmmnts is one of the newer open-source options built as a direct reaction to that: a single script tag, no ad network riding along, and your data on your own server if you want it there.
Disqus: the incumbent, still free to start
Disqus is free with paid options, and its core value proposition hasn't changed: it makes it easy to bolt on discussions and moderation to any site, with social network integration so people can log in with accounts they already have. It's been the safe, unremarkable choice for a long time precisely because it works everywhere and almost every site owner has seen it before.
Who it's for: site owners who want a comment system they don't have to think about, with a large existing user base and no infrastructure to manage.
The catch: the interface has a reputation for feeling cluttered, and — the complaint that pushes people toward alternatives — there's real risk of abusive or spammy comments without active moderation, on top of the ad-supported model that comes with the free tier.
cmmnts: for people who want to own the data
cmmnts is open-source and free, with self-hosting left to you — no licensing fee, but you're responsible for the infrastructure. Installation is a single script tag with no heavy configuration, and it supports threaded comments with real-time updates and basic moderation out of the box.
Who it's for: developers and site owners who want an auditable, self-hostable comment system and don't mind running (or paying someone to run) the backend themselves.
The catch: there's little public clarity yet on whether a hosted (non-self-hosted) tier exists or what it costs, self-hosting means you own the uptime and security of that infrastructure, and — being newer — its community and plugin ecosystem is much smaller than Disqus's.
cmmnts vs Disqus at a glance
| Criteria | cmmnts | Disqus |
|---|---|---|
| Price | Free, open source; self-hosting infra cost is on you | Free tier, paid options available |
| Hosting | Self-hosted | Fully hosted by Disqus |
| Setup | Single script tag | Embed + account setup |
| Ads / tracking | None — you control the stack | Ad-supported free tier |
| Ecosystem maturity | Small, growing | Large, established for over a decade |
| Moderation | Basic moderation built in | Moderation options, but abuse risk noted by users |
Verdict
Pick cmmnts if you or your team can self-host, you want a comment system that isn't quietly loading ad scripts on your visitors, and you're fine trading a smaller ecosystem for full control over your data. It's a natural fit for developer blogs and privacy-conscious sites.
Pick Disqus if you want the zero-maintenance option that's been battle-tested for years, don't want to run any extra infrastructure, and can live with its ad-supported free tier. Giscus and Commento are worth a look too if you want something in between — GitHub-based or paid self-hosted, respectively.