Compare API providers and markets
Two APIs.io tools answer the question every API decision comes down to: how does this compare? One works on vendors, the other on whole markets. Both score on the same rubric, the Kin Score plus agent readiness, so their answers line up with each other.
Two vendors, head to head
Composite and band, the leader on each facet, which artifacts each publishes, and what each costs to get into, quoted from their own pricing pages. 20 worked examples, from Stripe vs Adyen to OpenAI vs Anthropic.
compare_cohortsTwo markets, one rubric
Distributions, band splits, facet averages and adoption rates for any two tags, industries, regions or VC portfolios, plus a check on whether the gap reflects the market or our own coverage. 20 worked examples.
Provider comparisons
Stripe vs Adyen
Stripe leads on the Kin Score (81.1 to 71.1) and agent readiness. Adyen ships nearly twice as many APIs and leads on governance.
Twilio vs Vonage
Twilio scores 91.6 to Vonage's 71.3. The gap is almost entirely access clarity: how plainly each says what it costs and how to get in.
OpenAI vs Anthropic
Anthropic leads on the Kin Score (89.0 to 84.5). OpenAI leads on agent readiness and is the only one of the two shipping its own MCP server and agent skills.
Plaid vs MX Technologies
Plaid scores 84.6 against MX's 64.9 and nearly doubles its agent readiness. MX ships four times as many APIs.
GitHub vs GitLab
GitLab edges GitHub on the Kin Score (81.0 to 79.0), but GitHub is the more agent-ready API by 14 points.
Shopify vs BigCommerce
A near-tie on the Kin Score (83.0 to 82.5). BigCommerce is the more agent-ready, Shopify publishes the richer contracts.
HubSpot vs Salesforce
HubSpot posts the highest Kin Score on this page (93.2). Salesforce is the more agent-ready, and HubSpot's entry cost is a fraction of Salesforce's.
Cloudflare vs Fastly
Cloudflare scores 80.6 to Fastly's 63.7 and is nearly three times as agent-ready. Cloudflare ships ten artifact types Fastly does not.
SendGrid vs Mailgun
SendGrid scores 85.9 (exemplar) against Mailgun's 30.9 (thin). The gap is contracts, not the email product.
Datadog vs New Relic
Datadog leads on the Kin Score (77.6 to 71.0) with ten times the API surface. New Relic leads on developer ergonomics and operational transparency.
PayPal vs Square
Square is an exemplar at 78.1 and agent-native. PayPal scores 51.4, held back by governance and operational transparency.
Okta vs Auth0
Okta owns Auth0, and the two score within 3.4 points. Okta is the more agent-ready; Auth0 publishes the clearer price.
Zendesk vs Intercom
Zendesk is an exemplar at 71.2 with 150 APIs. Intercom scores 51.3 but is the one shipping its own MCP server.
Mailchimp vs Klaviyo
Mailchimp leads on the Kin Score (76.7 to 72.0). Klaviyo leads on agent readiness and is the only one of the two that is agent-native.
Algolia vs Elastic
Algolia leads on the Kin Score (81.3 to 77.6) and has more than twice Elastic's agent readiness. Elastic leads on governance by a wide margin.
Netlify vs Vercel
Netlify is an exemplar at 70.6 against Vercel's 57.5, and leads on agent readiness. Vercel publishes Arazzo workflows and usage billing.
Box vs Dropbox
Box scores 58.7 against Dropbox's 40.7 and is the more agent-ready. Box ships its own MCP server; Dropbox does not.
Supabase vs Firebase
Firebase edges Supabase on the Kin Score (46.1 to 42.8), but Supabase is more than three times as agent-ready.
Ramp vs Brex
Ramp outscores Brex 47.5 to 21.0, but Brex is the more agent-ready of the two. This pair shows why we report both.
Gusto vs Rippling
Gusto edges Rippling 37.2 to 31.0, and only Gusto is agent-ready. Both score low for platforms of their size.
Market comparisons
Payments & Money Movement vs Banking & Open Banking
Payments scores 3.9 points higher on average than banking and open banking, with twice as many exemplars. Part of that gap is our own coverage.
North America vs Europe
European providers outscore North American ones on the Kin Score, agent readiness and all six facets, and this is a comparison the coverage check allows.
Y Combinator vs Andreessen Horowitz
a16z companies edge YC on score, but YC companies are far likelier to ship their own MCP server: 23% against 16%.
Healthcare vs Insurance
Insurance outscores healthcare on score, agent readiness and contract quality. Healthcare has the lowest agent readiness in this showcase.
Artificial Intelligence vs Machine Learning
Providers tagged machine learning edge out the far larger AI cohort on score and developer ergonomics. AI has the higher ceiling and more first-party MCP.
Cybersecurity & Identity vs Developer Tools & DevOps
Developer tools lead on score and ergonomics, but cybersecurity companies are likelier to publish OAuth scopes. The gap is small and depth-confounded.
MCP vs AI Agents
Providers that ship MCP outscore providers that market AI agents by 11 points, and by 14 points on agent readiness.
E-Commerce Platform vs Retail
E-commerce platforms outscore retailers on every facet and have more than twice the exemplars. Retail's agent readiness stays near 10.
United Kingdom & Ireland vs Greater China
UK and Irish providers score twice as high as Greater China on average. Our own coverage of Chinese providers is part of the reason.
Blockchain, Crypto & Web3 vs Financial Services
Blockchain and crypto providers outscore traditional financial services by 5.8 points and ship first-party MCP at twice the rate.
Telecommunications & Connectivity vs IoT & Connected Devices
Telecommunications outscores IoT by 8.6 points, with 68 exemplars against 14. Part of the gap is our deeper coverage of telecom.
Logistics vs Supply Chain & Procurement
Logistics and supply chain score within 0.2 points of each other, and this is a comparison the coverage check allows.
Techstars vs 500 Global
Techstars companies outscore 500 Global's by 4.1 points, and the coverage check says the gap is the portfolios, not us.
Accel vs Insight Partners
Insight Partners edges Accel by 1.7 points on a comparison the coverage check allows. Both hold 25 exemplars.
Accounting & Finance Operations vs Human Resources & Payroll
Accounting and finance-ops platforms outscore HR and payroll by 4.2 points and ship first-party MCP at nearly twice the rate.
Open Source vs Enterprise
Open-source providers outscore enterprise ones on contracts and governance. Enterprise vendors win on access clarity by nearly 12 points.
Education & EdTech vs Government & Public Sector
EdTech outscores government and public-sector providers by 3.8 points. The largest gap is access clarity.
Media vs Gaming & Interactive
Media providers outscore gaming by 6.9 points and are nearly twice as agent-ready. Much of the gap is our coverage.
Energy vs Climate & Sustainability
Energy providers edge climate and sustainability companies by 1.9 points, but the climate cohort has the higher ceiling.
Biotechnology & Drug Discovery vs Pharmaceutical
Biotech and pharma score 10.9 and 10.7, a near-tie at the bottom of the catalog. Agent readiness averages about 3.
Work with this as data
Every comparison here is available over the APIs.io API and to AI agents over MCP.