Aviationstack is a scalable REST API for real-time flight tracking, historical flight data, airport info, and global aviation data.
from $49.99/mo
About Ably Realtime
What is Ably Realtime?
Ably Realtime is a cloud platform that keeps your app sessions durable and live—whether you're building chat, live dashboards, or AI agent interactions. It handles everything from message delivery to connection state, so you don't have to. With 6.5ms latency and 100% uptime over 7 years, it's built for serious scale.
Who is it for?
Ably is ideal for product teams in Fan Engagement, CXTech, HealthTech, and FinTech who need reliable realtime experiences without infrastructure headaches. It's not for simple static sites or local-only prototypes; it's designed for apps that need to stay live across millions of users.
Real use cases
Power live scores and interactive polls for fan engagement. Stream AI agent responses token-by-token over AI Transport. Sync application state across users with LiveObjects. Or launch chat features in minutes with AblyChat. Each use case benefits from Ably's elastic scaling and 30B+ connections opened monthly.
Key features
- Ably Pub/Sub — Flexible messaging APIs and message guarantees for realtime interactive experiences at scale.
- AblyChat — Rapidly launch chat with APIs optimized for massive user loads.
- AblyAI Transport — Drop-in realtime for continuous, controllable, always-in-sync agentic sessions.
- AblyLiveObjects — Realtime sync for application state across multiple users and devices.
- AblySpaces — Create collaborative environments in a few lines of code.
- AblyLiveSync — Seamlessly sync your database and frontend to millions of clients.
- SDKs for 12+ platforms — Consistent, idiomatic APIs for JavaScript, React, Python, .NET, Ruby, Flutter, and more.
SaaSpartout Score
7.8
/10
Editorial score from our review methodology — not user ratings.
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Ably Realtime Pricing
Ably Realtime pricing: from $29/mo + usage.
For comparison: the median starting price in Developer Tools is $19.99/month, measured across 301 tools we track. See the full SaaS Pricing Index →
Free
$0 — 200 concurrent connections, 500 messages/sec, 6M messages/month. Includes all Ably products, community & email support (best effort). No commitment.
Standard
$29/month + usage — 10k concurrent channels, 10k connections, 2.5k msg/sec. 1 day email support SLA, uptime SLO.
Pro
$399/month + usage — 50k concurrent channels, 50k connections, 10k msg/sec. 4-hour email support SLA, Datadog (lite).
Enterprise
Custom pricing — unlimited channels, connections, msg/sec. 24/7 support, 99.999% uptime SLA, SSO, dedicated cluster, HIPAA BAA available.
Usage-based pricing adds $2.50/million messages, $1.00/million connection minutes, $1.00/million channel minutes. Volume discounts available.
Frequently asked questions
Is Ably Realtime free to start?
Yes, there is a Free plan at $0 with 200 concurrent connections, 500 messages/second, and 6M messages/month. No credit card required.
How much does Ably Realtime cost?
Pricing starts at $29/month for the Standard plan (plus usage), or $399/month for Pro. Free plan also available. Enterprise has custom pricing. Usage rates: $2.50/million messages, $1.00/million connection minutes, $1.00/million channel minutes.
What is Ably Realtime used for?
Ably is used for building live chat, realtime dashboards, AI agent sessions, collaborative tools, live sports updates, and any app that needs durable, low-latency realtime data sync.
Who is Ably Realtime best for?
It's best for product teams and developers in fan engagement, CXTech, HealthTech, and FinTech who need scalable realtime infrastructure. Not ideal for static sites or very simple apps.
Does Ably offer a free trial or free tier?
Yes, the Free plan is a permanent free tier with 6M messages/month. No time-limited trial—you can start building immediately without cost.
What are the top alternatives to Ably Realtime?
Common alternatives include Pusher, Socket.IO (self-hosted), PubNub, and AWS AppSync. Each differs in pricing, latency guarantees, and ease of scaling.
