Comparison
EchoThread vs Cusdis
Cusdis is the minimalist favourite — a tiny (under 10 KB), open-source widget. EchoThread stays light too, but trades a few kilobytes for ML spam filtering, richer features, and managed hosting.
| Feature | EchoThread | Cusdis |
|---|---|---|
| Hosting model | Hosted (fully managed) | Self-hosted (or hosted tier) |
| Free tier | Free forever — 10K views/mo | Free to self-host |
| AI-generated spam | Caught by first-party ML | None built in |
| Spam filter | ML classifier (Siftfy) | Manual |
| Ads / tracking | Never | No |
| Bundle size | ~37 KB gzipped | < 10 KB |
| Reactions & image uploads | Yes | No |
| Moderation dashboard | Yes | Basic (email / Telegram) |
| Data export | JSON / CSV, all sites | Full DB access (self-hosted) |
| Open source | No | Yes |
Comparison reflects publicly documented features as of 2026-06-05. Spot something out of date? Tell us — we keep these honest.
Which should you pick?
Pick EchoThread if you want a still-light widget that adds ML spam filtering, reactions, image uploads, and a real moderation dashboard — hosted, so you never babysit it. Pick Cusdis if absolute minimal page weight and a tiny open-source codebase are your top priorities and you will moderate spam manually.
Where Cusdis is the better call
Cusdis is the smallest footprint in the category (under 10 KB) and fully open-source. If absolute minimal page weight and a tiny, hackable codebase are your priorities — and you are happy to moderate spam manually — Cusdis is purpose-built for that.
The difference that matters in 2026
Built for AI-generated comment spam.
Comment spam is now AI-generated — fluent, on-topic, and invisible to keyword filters and Akismet bolt-ons. EchoThread ships a first-party ML classifier (Siftfy) that scores every comment the moment it lands, so you can let readers comment freely and still keep threads clean.
Create your free siteQuestions
- Is EchoThread as lightweight as Cusdis?
- Cusdis is smaller (under 10 KB) because it does less. EchoThread is about 37 KB gzipped, and those extra kilobytes buy a first-party ML spam filter, reactions, image uploads, link previews, and a full moderation dashboard.
- Does EchoThread handle spam better than Cusdis?
- Yes. Cusdis has no built-in spam filtering — moderation is manual. EchoThread scores every comment with a machine-learning classifier (Siftfy) as it is posted, including AI-generated spam, so your queue stays manageable.
- Do I have to self-host EchoThread like Cusdis?
- No. EchoThread is fully managed — there is no server to run. You still get a one-click export of all your comments as JSON or CSV, so the data-ownership benefit of self-hosting is preserved without the operational overhead.
See the full category lineup on the Disqus alternatives page.