Real-time / WebSocket Infrastructure
The clearest split is that Ably lists entry pricing at $29 / month versus $500 per month for 100ms. Ably is Real-time messaging infrastructure with pub/sub, presence, and 99.999% uptime SLA across global PoPs; 100ms is Real-time / WebSocket Infrastructure tool for developers. The data points Ably at chat applications and live collaboration features, and 100ms at chat applications and live collaboration features. Pricing: Ably is subscription from $29 / month; 100ms is subscription from $500 per month. Lock-in is low for Ably and low for 100ms, with DX at 5/5 vs 4/5 and transparency at 4/5 vs 3/5. On listed strengths, Ably emphasises chat applications and live collaboration features, and 100ms emphasises chat applications and live collaboration features. Both offer an enterprise tier for larger rollouts. Honest trade-off: neither fits static projects, so if that is your context, look elsewhere; otherwise pick on the pivotal factor above and the DX score that matters most to your team.
Quick take
Ably is for chat applications; 100ms is for chat applications; decide based on your entry-price budget.
 Ably |  100ms | |
|---|---|---|
| Category | Real-time / WebSocket Infrastructure | Real-time / WebSocket Infrastructure |
| Pricing Model | subscription | subscription |
| Entry Price | $29 / month | $500 per month |
| Free Tier | Yes | Yes |
| Billing Complexity | — | — |
| Developer Experience | 5/5 | 4/5 |
| Pricing Transparency | 4/5 | 3/5 |
| Lock-in Level | low | low |
| Migration Complexity | — | — |
| Data Portability | — | — |
| Enterprise | Available | Available |
| GitHub Stars | 361 | 203 |
| License | Apache-2.0 | MIT |
Choose Ably if an entry price of $29 / month fits your budget and your workload matches chat applications. Skip it if your context is static projects.
Not for: Static projects
Choose 100ms if an entry price of $500 per month fits your budget and your workload matches chat applications. Skip it if your context is static projects.
Not for: Static projects
Check each tool's dedicated page for deeper reviews, setup notes, and pros/cons.
Listed entry pricing is $29 / month for Ably and $500 per month for 100ms. Both offer a free tier for getting started. Total cost at scale depends on usage and plan details that are not in this dataset, so confirm with each vendor.
Ably is tagged with low lock-in (proprietary pub/sub protocol and presence model). 100ms is tagged with low lock-in (proprietary real-time sdk with custom session model; migration requires rewrite). Both sides are low lock-in, so a migration is feasible but still needs planning around data export and SDK rewrites.
The dataset rates Ably at 5/5 for developer experience and 100ms at 4/5, so Ably scores higher. That score reflects overall polish rather than any single integration, so trial both against your stack before committing.
Yes for teams whose workload matches chat applications, since both list the same fit. 100ms is flagged as not for static projects, so confirm your context does not fall there.
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