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Head-to-head · Domain Registration APIs

OpenSRS vs ResellerClub API

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score OpenSRS #4 in Domain Registration APIs 8.9/10 Free plan Free plan✓ 0 of 6 features Visit OpenSRS
ResellerClub API #8 in Domain Registration APIs 8.5/10 Free plan Free plan✓ 5 of 6 features Visit ResellerClub

OpenSRS leads on 0 checks, ResellerClub API on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOpenSRS · 8.9/10
  • Free planboth
  • Most featuresResellerClub API · 5 of 6

OpenSRS scores higher on our rubric for domain registration apis: 8.9 against 8.5 out of 10; our editors rank them #4 and #8.

OpenSRS is the better fit for established resellers wanting storefront and APIs. ResellerClub API is the better fit for resellers wanting free API testing and integrations.

  • OpenSRS fits best

    Established resellers wanting storefront and APIs

  • ResellerClub API fits best

    Resellers wanting free API testing and integrations

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Side by side

Feature OpenSRS 8.9/10 Visit ↗ ResellerClub API 8.5/10 Visit ↗
At a glance
Editor score 8.9 8.5
Ranking #4 in Domain Registration APIs #8 in Domain Registration APIs
Best for Established resellers wanting storefront and APIs Resellers wanting free API testing and integrations
Pricing model Free plan + paid Free plan + paid
Starting price — Free plan
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Support Live chat, Phone, Tickets, Docs · 24/7 Email, Live chat, Tickets, Docs · 24/7
Integrations 12 integrations 4 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features OpenSRS 0/6 · ResellerClub API 5/6
Domain search API Not checked yet ✓ (best)
Bulk registration Not checked yet Not checked yet
Transfer management Not checked yet ✓ (best)
Renewal management Not checked yet ✓ (best)
Premium domains Not checked yet ✓ (best)
Sandbox environment Not checked yet ✓ (best)
Our review
Pros
  • Domain, TLS/SSL, DNS, transfer, renewal, and management APIs
  • White-label Storefront with customer self-service portals
  • Bulk operations, WHMCS modules, Stripe, and reseller integrations
  • Covers search, registration, renewal, transfer, DNS, and forwarding workflows
  • Includes a separate sandbox for testing credentials and provisioning workflows
  • Integrates with WHMCS, Blesta, AWBS, and HostBill
Cons
  • Pricing varies by TLD and reseller tier
  • The platform is oriented toward reseller and platform businesses
  • Advanced capabilities require choosing among multiple pricing tiers
  • Legacy HTTP API documentation may add complexity for new implementations
  • Retailers must manage TLD-dependent domain operations and pricing
  • Bulk API registration is not part of the documented feature set
Our verdict

OpenSRS is Tucows’ wholesale domain reseller platform for hosting companies, website builders, ecommerce platforms, agencies, software companies, and internet service providers. It supports domain registration, transfers, renewals, DNS…

Read the review →

ResellerClub API provides domain-reselling infrastructure for web hosts, developers, agencies, and website-builder platforms. Its REST API supports availability searches, registrations, renewals, transfers, customer and contact records,…

Read the review →
  1. OpenSRSDomain Registration APIs 8.9Free plan
  2. ResellerClub APIDomain Registration APIs 8.5Free plan

Strengths and trade-offs

  • OpenSRS — where it wins

    • Domain, TLS/SSL, DNS, transfer, renewal, and management APIs
    • White-label Storefront with customer self-service portals
    • Bulk operations, WHMCS modules, Stripe, and reseller integrations

    Where it doesn't

    • Pricing varies by TLD and reseller tier
    • The platform is oriented toward reseller and platform businesses
    • Advanced capabilities require choosing among multiple pricing tiers

  • ResellerClub API — where it wins

    • Covers search, registration, renewal, transfer, DNS, and forwarding workflows
    • Includes a separate sandbox for testing credentials and provisioning workflows
    • Integrates with WHMCS, Blesta, AWBS, and HostBill

    Where it doesn't

    • Legacy HTTP API documentation may add complexity for new implementations
    • Retailers must manage TLD-dependent domain operations and pricing
    • Bulk API registration is not part of the documented feature set

More comparisons

All domain registration APIs comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update