Similarweb Similar sites API
Find the websites Similarweb ranks as most similar to any website: up to 20 competitor and alternative sites in similarity order, each with its similarity score, category, top-country rank, estimated monthly visits, and description - as normalized JSON.
$1.67/1k req, pay per request, no subscription.
{"domain": "paypal.com","similarityRank": 1,"similarityScore": 0.78,"description": "PayPal is a digital payments platform for sending, receiving and managing money online.","category": "Finance/Banking_Credit_and_Lending","topCountryRank": 210,"totalVisits": 412000000,"image": "https://site-images.similarcdn.com/image?activityType=snapshot&url=paypal.com"}
Pricing and providers
Similarweb Similar sites API pricing: one API, 2 interchangeable providers
The cheapest provider serves first. If it fails, the next one takes over in the same call.
Try it
Get Similarweb similar sites in one request
This sample shows 17 of 18 fields. See every field
{
"found": true,
"data": {
"domain": "stripe.com",
"title": "Stripe | Financial Infrastructure to Grow Your Revenue",
"description": "Stripe powers online and in-person payment processing and financial solutions for businesses of all sizes.",
"category": "Finance/Banking_Credit_and_Lending",
"totalVisits": 28400000,
"tags": [
"payments",
"fintech",
"developer tools",
"ecommerce infrastructure"
],
"sites": [
{
"domain": "paypal.com",
"similarityRank": 1,
"similarityScore": 0.78,
"description": "PayPal is a digital payments platform for sending, receiving and managing money online.",
"category": "Finance/Banking_Credit_and_Lending",
"topCountryRank": 210,
"totalVisits": 412000000,
"image": "https://site-images.similarcdn.com/image?activityType=snapshot&url=paypal.com"
},
{
"domain": "squareup.com",
"similarityRank": 2,
"similarityScore": 0.71,
"description": "Square provides point-of-sale, payments and business tools for merchants.",
"category": "Finance/Banking_Credit_and_Lending",
"topCountryRank": 3840,
"totalVisits": 19800000,
"image": "https://site-images.similarcdn.com/image?activityType=snapshot&url=squareup.com"
},
{
"domain": "adyen.com",
"similarityRank": 3,
"similarityScore": 0.64,
"description": "Adyen is a global payments platform for enterprise businesses.",
"category": "Finance/Banking_Credit_and_Lending",
"topCountryRank": null,
"totalVisits": 4200000,
"image": null
}
]
}
}Full parameter and response reference - every field, type, and example for this endpoint.
Reference
One request, one response shape.
Every field you send and every field you get back, each with a real example.
Last verified 2026-11-07 · uptime and latency measured over 30d
Request body
JSON, posted to this endpoint.
- domainstring
stripe.com
The website's domain, without a scheme or path (e.g. stripe.com).
Response
JSON, one example value per field.
- categorystring
Finance/Banking_Credit_and_Lending
Similarweb category of the website (e.g. Finance).
- descriptionstring
Stripe powers online and in-person payment processing and financial solutions for businesses of all sizes.
The website's meta description as Similarweb records it.
- domainstring
stripe.com
The website's domain. Populated whenever the provider has data for the entity.
- tagsstring[]
Topic tags Similarweb assigns the website.
- titlestring
Stripe | Financial Infrastructure to Grow Your Revenue
The website's page title as Similarweb records it.
- totalVisitsinteger
28400000
Estimated monthly visits to the website.
Websites most similar to this one, up to 20, most similar first. Populated whenever the provider has data for the entity.
- categorystring
Finance/Banking_Credit_and_Lending
Similarweb category path of the similar website (e.g. Finance/Banking_Credit_and_Lending).
- descriptionstring
PayPal is a digital payments platform for sending, receiving and managing money online.
The similar website's meta description.
- domainstring
paypal.com
The similar website's domain.
- imagestring
https://site-images.similarcdn.com/image?activityType=snapshot&url=paypal.com
Screenshot of the similar website's homepage.
- similarityRankinteger
1
Position in the similarity list, 1 being most similar.
- similarityScorenumber
0.78
Similarweb's similarity score from 0 to 1, higher meaning more similar.
- topCountryRankinteger
210
The similar website's traffic rank in its own top country.
- totalVisitsinteger
412000000
Estimated monthly visits to the similar website.
- foundboolean
true
- reason"not_found"
Present only when `found` is false, and says why there is no result. `not_found`: the source states the target does not exist, or returned nothing for it. A `found: false` answer is a successful call, not an error, and `costUsd` is what it actually cost.
FAQ
About the Similarweb Similar sites API
The AnyAPI Similarweb Similar sites API returns Similarweb similar sites data as normalized JSON from one POST call to /v1/run/similarweb.similar_sites. Find the websites Similarweb ranks as most similar to any website: up to 20 competitor and alternative sites in similarity order, each with its similarity score, category, top-country rank, estimated monthly visits, and description - as normalized JSON. AnyAPI routes each request across 2 sources and falls back automatically when one fails. It costs from $1.67 per 1,000 requests, in US dollars with no subscription and no monthly minimum. Over the last 30 days, 100.0% of Similarweb similar sites calls through AnyAPI succeeded, with a median response time of 2.6 seconds across 2,022 measured calls.