SimilarWeb API (Scraper)

What does SimilarWeb API do?

SimilarWeb API extracts website traffic analytics for any domain — visits, rankings, engagement, traffic sources, top countries, and keywords. Paste a list of domains (or full URLs), run the Actor, and download clean JSON / CSV / Excel.

Built for bulk runs — up to 100,000 domains. Large lists are handled automatically so you get one dataset without babysitting the job. Tuned for speed and reliability at Store scale (512 MB default).

This Actor is not affiliated with SimilarWeb. Metrics are third-party estimates — use them as directional intelligence, not audited truth.

Why use it

• Competitive intel in bulk — traffic, rank, and channel mix for whole lists of sites
• Reliable at scale — retries and recovery so long runs keep delivering results
• Flexible modes — fast default for volume, or stronger modes when you need max success rate
• Pay for answers — failed domains stay in the dataset but are not billed
• Export anywhere — JSON, CSV, Excel, HTML from the Apify dataset

Use cases

• Competitive analysis (traffic, rankings, channel mix)
• Media & marketplace research (score publishers / affiliates by audience)
• Marketing ROI (where traffic comes from before budget allocation)
• CRM / lead enrichment (attach traffic and rank signals to accounts)
• Investment & due diligence (directional digital footprint)
• Content & SEO prioritization (visits, geo share, top keywords)

How to use

1. Open SimilarWeb API in Apify Console
2. Paste domains or URLs in Domains (e.g. apify.com, https://www.lemonde.fr)
3. Keep defaults for production (512 MB)
4. Click Start
5. Download results from the Dataset tab

Input

Field	Type	Default	Description
domains	string[]	-	Domains or URLs to analyze (required, up to 100,000)
fetchMode	string	extension	extension (fast default), auto (fast then stronger), browser, http
maxConcurrency	integer	5	Parallelism (keep lower for browser)
cacheTtlHours	integer	72	Reuse successful results within the run (0 = off)
proxyConfiguration	object	RESIDENTIAL	Required for reliable runs
includeKeywords	boolean	true	Include top keywords when present
includeCountries	boolean	true	Include geo traffic share
maxRetries	integer	1	Retries per domain on temporary failures

Output example

You can download the dataset in JSON, HTML, CSV, or Excel.

{
  "domain": "apify.com",
  "title": "apify.com Traffic Analytics, Ranking & Audience",
  "globalRank": 9646,
  "visits": 4201537,
  "bounceRate": 0.37,
  "pagesPerVisit": 7.43,
  "avgVisitDuration": 300,
  "trafficSources": {
    "direct": 0.44,
    "searchOrganic": 0.35
  },
  "topCountries": [
    { "country": "United States", "value": 0.21 }
  ],
  "scrapedAt": "2026-09-24T12:00:00.000Z",
  "error": null
}

Failed domains still appear with error set and metrics null — they are not billed.

Data fields

Field	Description
domain	Normalized hostname
title	Site title / label
globalRank	Worldwide traffic rank
visits	Estimated monthly visits
bounceRate	Bounce rate
pagesPerVisit	Pages per visit
avgVisitDuration	Average visit duration (seconds)
trafficSources	Channel mix (direct, search, social, …)
topCountries	Top geos with share
topKeywords	Top keywords when enabled / available
error	Error message if the domain failed

Pricing

Pay-per-event pricing (platform usage is billed separately by Apify):

Event	When charged	Price
result	Each successful domain written to the dataset	$0.005 ($5 / 1,000)
Actor Start	Once when the run starts (scaled by memory GB)	$0.001

Example: 100 successful domains ≈ $0.50 in PPE result (+ Actor Start + Apify platform usage).

Only successful results are charged. Failed domains are free on the PPE event.

Recommended settings

Goal	Settings
Production	fetchMode: extension, 512 MB, concurrency 5–10, residential proxy
Max reliability	fetchMode: auto, residential proxy, 2048 MB
Browser-only	fetchMode: browser, concurrency 1–2, 2048 MB
Huge lists	up to 100,000 domains — leave defaults

FAQ

How many domains per run? Up to 100,000. Invalid and duplicate inputs are filtered before work starts.

What if a domain fails? It is stored with error. Other domains continue. Failed items are not billed.

Do I need proxies? Yes — residential (default). Datacenter proxies are unreliable for this Actor.

Which fetchMode should I use? Keep extension for most runs. Use auto when you prefer success rate over speed.

Is this official SimilarWeb data? No. This Actor is independent and unaffiliated. Numbers are estimates.

Support

Questions, bugs, or feature requests: use the Actor Issues tab on Apify, or contact Clovys through the Store profile.