Recordwire

Compare

Middesk vs OpenSOSData

Middesk is a KYB platform with TIN, watchlist, and lien checks, monitoring, and an MCP server. It sells through a contact form.[1][2][3][4] OpenSOSData sells raw Secretary of State lookups, live or cached, from $0.0314 per live lookup with no subscription.[5] Pick Middesk to have verification done for you. Pick OpenSOSData for cheap state records you check yourself.

Vendor facts from each vendor's own public pages, read 2026-10-16. Sources are listed below.

Middesk vs OpenSOSData, side by side
MiddeskOpenSOSDataRecordwire
ModelKYB verification platform with ongoing monitoring: dashboard, REST API, and MCP server.[6]Secretary of State lookup API, live or cached, plus bulk lookups and CSV datasets.[5][7][8]Change feed plus lookup. Each new state file is compared with the last, and every difference is stored as a dated event. REST API, MCP server, and webhooks.[9]
U.S. state coverageSearches all 50 states and D.C. for every business it verifies.[10]Claims 53: all 50 states, D.C., Puerto Rico, and the U.S. Virgin Islands. Its states page lists 51.[5][11]12 states. Florida, New York, Colorado, Pennsylvania, Virginia, Connecticut, and Oregon from official bulk files and open data. Massachusetts, Idaho, Wyoming, and Missouri from the state's public search, new formations only. Delaware from a licensed data partner, new formations only.[12]
FreshnessSearched when you order a verification. Without monitoring, the timeline is current as of the last order.[10][13]Live scrape on demand, with a median of 58 seconds; cached results otherwise. Its pages give the cache window as 7 days and as 30 days.[14][5][15]As often as each state publishes: daily in Florida, New York, Colorado, and Oregon, monthly in Pennsylvania, weekly in Virginia, nightly in Connecticut, every 3 hours in Massachusetts and Missouri, every 6 hours in Idaho, continuously in Wyoming, and several times a day in Delaware.[12]
Change events and historyYes, per verified business: a timeline of status, address, name, and officer changes, plus watchlist, lien, bankruptcy, and TIN events.[13][2]Recent filing history per lookup. Weekly monitors on cached plans; new-formation and status-change lists sold as CSV.[16][7][8]Six event types: formed, renamed, status, address, registered agent, officers. Full change events in the seven file states; new formations only in the other five. Virginia and Florida include state-published history.[17][12]
WebhooksYes, plus email notifications for monitoring events.[18][2]Yes, for bulk jobs and for monitors.[16][7]Yes. Signed webhooks per subscription, filtered by state, event type, or up to 10,000 company IDs.[9]
MCP serverYes, official, over HTTP and SSE with OAuth or an API key; access through sales.[3]An npm package, @opensosdata/mcp-server; not mentioned on its site.[19]Yes. Remote server at api.recordwirehq.com/mcp: five read tools and three for webhook subscriptions, one bearer key.[20]
OfficersYes, and registered agents.[21]Where available, plus registered agent.[5]Where the state publishes them: Florida, Pennsylvania, Connecticut, Massachusetts, Wyoming; partly in New York, Virginia, Oregon. None in Colorado, Idaho, Missouri.[12]
Published pricingNot published; sold through a contact form.[4]Pay as you go: live lookups $0.10 down to $0.0314, cached $0.01 down to $0.00314. Cached plans $100 to $1,000 a month. 10 free lookups.[5][14]$100 a month for one state, $200 for any three, $500 for all. No free trial.[22]

Who Middesk fits

Teams onboarding businesses that want state searches, IRS TIN matching, sanctions and adverse media screening, and monitoring with webhook and email alerts from one vendor.[10][1][2]

Who OpenSOSData fits

Developers who want the state record at the lowest published price and make the decision themselves. Live lookups take a median of 58 seconds; cached ones are faster and cheaper.[5][14]

Where Recordwire fits

Middesk tracks the businesses you verify. OpenSOSData monitors a capped list weekly on cached plans.[2][7] Recordwire sends every formation, and in its seven file states every later change, as dated events through REST, webhooks, and MCP. It covers twelve states, fewer than either vendor.[17][12][9]

Compare each with Recordwire: Middesk vs Recordwire and OpenSOSData vs Recordwire.

Questions

Which one is cheaper?

OpenSOSData publishes prices: live lookups $0.10 down to $0.0314, cached $0.01 down to $0.00314, and 10 free lookups.[5] Middesk does not publish prices.[4]

Do they monitor businesses after onboarding?

Both offer it. Middesk sends a webhook and an email when a monitored business changes.[2] OpenSOSData’s llms.txt describes weekly monitors on cached plans, 25 to 500 by plan, that post to a webhook; its HTML pages do not describe them.[7]

Do they have MCP servers?

Middesk has an official MCP server, with access through sales.[3] OpenSOSData has an npm package, @opensosdata/mcp-server, that its site does not mention.[19]

Which one covers more jurisdictions?

OpenSOSData claims 53, adding Puerto Rico and the U.S. Virgin Islands; its states page lists 51.[5][11] Middesk searches all 50 states and D.C.[10]

More comparisons

Sources

  1. Middesk: business verification. https://www.middesk.com/solutions/verification. Accessed 2026-10-16.
  2. Middesk docs: how monitoring works. https://docs.middesk.com/monitor-activity/how-monitoring-works. Accessed 2026-10-16.
  3. Middesk docs: MCP server. https://docs.middesk.com/build/mcp-server. Accessed 2026-10-16.
  4. Middesk: talk to an expert. https://www.middesk.com/contact. Accessed 2026-10-16.
  5. OpenSOSData home page. https://opensosdata.com/. Accessed 2026-10-16.
  6. Middesk llms.txt. https://www.middesk.com/llms.txt. Accessed 2026-10-16.
  7. OpenSOSData llms.txt. https://opensosdata.com/llms.txt. Accessed 2026-10-16.
  8. OpenSOSData datasets. https://opensosdata.com/datasets/. Accessed 2026-10-16.
  9. Recordwire API docs. https://recordwirehq.com/docs. Accessed 2026-10-16.
  10. Middesk docs: registration. https://docs.middesk.com/verify-business/registration. Accessed 2026-10-16.
  11. OpenSOSData state coverage. https://opensosdata.com/states/. Accessed 2026-10-16.
  12. Recordwire coverage by state. https://recordwirehq.com/states. Accessed 2026-10-16.
  13. Middesk docs: business timeline. https://docs.middesk.com/monitor-activity/timeline. Accessed 2026-10-16.
  14. OpenSOSData docs. https://opensosdata.com/docs/. Accessed 2026-10-16.
  15. OpenSOSData changelog. https://opensosdata.com/docs/changelog.html. Accessed 2026-10-16.
  16. OpenSOSData OpenAPI spec. https://opensosdata.com/openapi.yaml. Accessed 2026-10-16.
  17. Recordwire change events. https://recordwirehq.com/change-events. Accessed 2026-10-16.
  18. Middesk docs: webhooks. https://docs.middesk.com/build/webhooks. Accessed 2026-10-16.
  19. @opensosdata/mcp-server on npm. https://www.npmjs.com/package/@opensosdata/mcp-server. Accessed 2026-10-16.
  20. Recordwire MCP server. https://recordwirehq.com/mcp. Accessed 2026-10-16.
  21. Middesk docs: owners and officers. https://docs.middesk.com/verify-business/owners-officers. Accessed 2026-10-16.
  22. Recordwire pricing. https://recordwirehq.com/#pricing. Accessed 2026-10-16.

Something here out of date? Email brian@recordwirehq.com and it gets fixed.

Get a keyAll comparisons