OddsRelay vs Odds-API.io

Self-serve and priced by how many bookmakers you select, Odds-API.io states 365+ bookmakers across 34 sports, with pre-match, live and historical odds. OddsRelay goes deeper on one region, the UK & Ireland: every bookmaker on every plan, as a raw feed or with each price already paired to an exchange lay price.

Facts about Odds-API.io checked 7 October 2026.

Which to pick

Pick Odds-API.io if

You need many sports and regions: its homepage states 365+ bookmakers.
You need live odds as well as pre-match, with a WebSocket stream.
You want historical odds and closing lines for backtesting.
You want prediction markets such as Polymarket and Kalshi, or official Python and TypeScript SDKs.

Pick OddsRelay if

You are building an oddsmatcher and want bookmaker prices already paired with exchange lay prices.
You want exchange lay prices on every plan, Free included.
You want every bookmaker in the region on every plan, rather than a set number per self-serve plan.
You want a free plan to start on: 2,500 tokens a month.

Side by side

OddsRelay and Odds-API.io compared
Compared on	Odds-API.io	OddsRelay
Output	Odds per bookmaker and market, pre-match, live and historical, plus data it computes, such as its ON Sharp consensus line and its value-bet and arbitrage endpoints. Each bookmaker and exchange comes back under its own name, and its API reference lists no endpoint that pairs exchange lay prices with bookmaker prices.	Two feeds on every plan: raw bookmaker prices, and the same prices already paired with an exchange lay price and its liquidity, ready for an oddsmatcher.
bet365	States bet365 is included on every plan, as one of the bookmakers you select: pre-match and live odds and player props.	In the feed. bet365's page lists the feed types that carry it.
UK bookmakers	Its UK page lists 20, including bet365, William Hill, Sky Bet, Ladbrokes, Coral and Paddy Power.	140+ bookmakers, 60+ of them live in the UK & Ireland, in one schema. The coverage page shows what we cover.
Exchange lay prices	Exchange prices on paid plans, where a row can carry the lay price and the amount available at the best price. You pair lay prices with bookmaker prices yourself.	Lay prices and liquidity from the four UK exchanges (Betfair, Smarkets, Matchbook and BETDAQ), beside each bookmaker price in the raw feed and paired with it in the matched feed.
Regions	Its `/odds` call takes the bookmakers you name. Its directory groups books by region.	The UK & Ireland today, with 60+ bookmakers live, selected with one `region` parameter.
Delivery	REST on every plan, pre-match and live. Its pricing page lists WebSocket streaming as a paid add-on, and when you reconnect it can replay the latest state of each event and bookmaker you missed.	REST, polled pre-match, with ETag caching and gzip. No in-play stream.
Historical odds	Per-event closing odds on every plan, back to December 2025, with bulk closing lines on paid plans.	None. The feed carries current pre-match prices. For backtesting, Odds-API.io's history is the better tool.
Pricing	Published self-serve plans in pounds, priced by how many bookmakers you select. Enterprise, for unlimited requests, is quoted on request. Its pricing page states a 7-day money-back guarantee on card payments, and says new free keys are paused.	Published plans (Free, Starter, Pro and Business), with Enterprise quoted. Every plan includes every product and every bookmaker in its region. Plans differ only in tokens.
Docs and sign-up	Public docs with an OpenAPI spec, official Python and TypeScript SDKs, an MCP server and a dated changelog. Paid sign-up is self-serve.	Public docs and self-serve sign-up for a key.

How many bookmakers does Odds-API.io cover?

Its homepage states 365+. Its bookmaker directory gives a slightly different total, so check the directory or its UK page for the ones you need.

Is Odds-API.io the same as The Odds API?

No. They are two services at two addresses. Odds-API.io's terms of service name its operator as Outlier AS, a company registered in Norway. The Odds API is at the-odds-api.com, and this site compares OddsRelay with it on a separate page.

Sources

Every fact about Odds-API.io above comes from its own public pages. They change, so check them before you rely on them. OddsRelay does not resell any other provider's feed.

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