Ably
Ably, founded in 2013 and headquartered in the United Kingdom, operates a realtime infrastructure platform that enables developers to embed live, synchronized experiences into applications.
Profile
Ably provides a cloud-based platform that lets developers add realtime data synchronization and messaging features to applications without managing server infrastructure.
Ably, founded in 2013 and headquartered in the United Kingdom, operates a realtime infrastructure platform that enables developers to embed live, synchronized experiences into applications. The company's core product is a pub/sub messaging layer that handles persistent connections, message delivery, and state synchronization across devices. As of mid-2025, Ably reports processing over 30 billion connections monthly with a claimed 6.5ms message delivery latency and 100% uptime over seven years.
The product portfolio has expanded beyond basic pub/sub to include Ably Chat (launched 2024), Ably Spaces (collaborative environments), Ably LiveSync (database-to-frontend sync), Ably LiveObjects (state sync), and the recently introduced Ably AI Transport, positioned as a drop-in infrastructure layer for multi-device AI agent sessions. The company raised a $70 million Series B in June 2021, co-led by Insight Partners and Dawn Capital, bringing total disclosed funding to approximately $90 million. Ably has not disclosed revenue or valuation figures publicly.
The customer base spans digital-native companies and enterprises needing realtime features—notably, the dossier does not name specific clients. Ably competes in a crowded space against offerings from PubNub, Pusher, and cloud providers' native services (AWS IoT, Google Pub/Sub). A key strategic move in 2025-2026 is the push into AI infrastructure with Ably AI Transport, targeting developers building agentic, multi-device AI applications.
The company's reliance on a single funding round six years ago, lack of disclosed revenue growth, and the commoditization of realtime messaging by hyperscalers represent material risks. No recent funding rounds, leadership changes, or customer churn events are publicly documented in the dossier.
Products by Ably
- A Ably AI Transport Ably AI Transport is a durable session layer designed for developers building AI assistants, copilots, and agentic workflows. Be the first to review →
- A Ably Chat Ably Chat is a real-time chat API platform designed for developers building large-scale chat applications across industries like Be the first to review →
- A Ably LiveSync Ably LiveSync is a real-time data synchronization platform designed for developers building interactive applications that require seamless data Be the first to review →
- A Ably Spaces Ably Spaces is a real-time collaboration SDK designed for developers building interactive, multi-user applications such as collaborative document Be the first to review →
Who buys this
- Developers building realtime collaborative tools (e.g., document editing, whiteboarding)
- Companies deploying live chat, notifications, or activity feeds in web and mobile apps
- Organizations requiring multi-device state synchronization for IoT or multiplayer gaming
- AI application developers needing persistent, low-latency connections for agentic workflows
- Enterprises migrating from self-managed WebSocket or MQTT infrastructure to a managed service
Strengths and what to watch
Strengths
- Claims 100% uptime over seven years and 6.5ms average message delivery latency, suggesting reliable infrastructure for latency-sensitive applications.
- Product portfolio covers multiple realtime use cases (chat, collaboration, state sync, AI transport) from a single platform, reducing integration complexity for developers.
- Raised $70 million Series B from Insight Partners and Dawn Capital in 2021, providing a multi-year runway to invest in product expansion and go-to-market.
Watch for
- No disclosed revenue, ARR, or customer count since the 2021 funding round; the company's financial health and growth trajectory are opaque.
- The realtime infrastructure market is increasingly commoditized by hyperscalers (AWS, Google Cloud) offering similar pub/sub services at competitive prices, pressuring Ably's differentiation and pricing power.
- The pivot to AI infrastructure with Ably AI Transport is unproven; the company faces entrenched competitors like LiveKit and Agora in the realtime AI space, and no customer adoption data is publicly available.
Key Information
- Industry
- Streaming/In-Memory
- Founded
- 2013
- Employees
- 120
- Headquarters
- United Kingdom
Frequently Asked Questions
What is Ably and what does it do?
Ably is a cloud-based platform that lets developers add realtime data synchronization and messaging to applications without managing server infrastructure. It handles persistent connections, message delivery, and state synchronization across devices, processing over 30 billion connections monthly as of mid-2025.
How does Ably's pub/sub messaging work?
Ably's core product is a pub/sub messaging layer that enables realtime communication between devices. It manages persistent connections and ensures reliable message delivery with a claimed average latency of 6.5ms. Developers use it to build live chat, notifications, and collaborative features without handling server infrastructure.
What is Ably AI Transport and who is it for?
Ably AI Transport is a drop-in infrastructure layer for multi-device AI agent sessions, launched in 2025. It targets developers building agentic, multi-device AI applications that need persistent, low-latency connections. It competes with LiveKit and Agora in the realtime AI space.
How reliable is Ably's platform according to its claims?
Ably claims 100% uptime over seven years and an average message delivery latency of 6.5ms. It reports processing over 30 billion connections monthly. These claims suggest reliable infrastructure for latency-sensitive applications, but no independent verification or customer adoption data is publicly available.
How much funding has Ably raised and from whom?
Ably raised a $70 million Series B in June 2021, co-led by Insight Partners and Dawn Capital, bringing total disclosed funding to approximately $90 million. The company has not disclosed revenue, ARR, or valuation figures publicly, and no recent funding rounds are documented.
Who are Ably's main competitors in the realtime infrastructure market?
Ably competes with PubNub, Pusher, and cloud providers' native services like AWS IoT and Google Pub/Sub. The market is increasingly commoditized by hyperscalers, pressuring Ably's differentiation. In the AI space, it faces LiveKit and Agora for realtime AI agent connections.
Sources
- ably.com — Product portfolio (Pub/Sub, Chat, AI Transport, LiveObjects, Spaces, LiveSync), performance claims (6.5ms latency, 30B+ connections, 100% uptime), and AI Transport launch.
- techcrunch.com — Series B funding of $70 million co-led by Insight Partners and Dawn Capital in June 2021.
- www.youtube.com — TechCrunch Disrupt 2025 panel discussing VC bets in 2026; confirms Ably's presence in the realtime infrastructure space as of 2025.
- investors.n-able.com — N-able Q1 2026 earnings (unrelated company); included in dossier but no Ably-specific data.