List of API Software | Last updated: October 13, 2026
This page lists the 384 tools in the TechZella directory that are classified under API, a platform in our taxonomy. Every profile summarises what the product does, who it suits, what it costs, and where it falls short, based on documented vendor and independent sources rather than hands-on testing. Examples in this group include 1Password, Canva, Descartes Systems Group, Grammarly Business, Magento (Adobe Commerce), Otter.ai, Scribie and Trellix Endpoint Security; the list is alphabetical and does not imply a ranking. Across these tools the industries most often documented are Education, Professional Services, Financial Services, Healthcare. The most common documented use cases are Workflow automation, Sales pipeline management, Hybrid events, Team collaboration. Tools here are most often also filed under CRM Software, Webinar Software, Virtual Event Software, Cloud Storage. To compare options, open each profile and read the Decision Snapshot, the pricing and total cost sections, and the Gotchas, then check the alternatives listed for the products you are considering. Features, pricing and availability change, so confirm current details with each vendor before you decide.
This page lists the 384 tools in the TechZella directory that are classified under API, a platform in our taxonomy. Every profile summarises what the product does, who it suits, what it costs, and where it falls short, based on documented vendor and independent sources rather than hands-on testing. Examples in this group include 1Password, Canva, Descartes Systems Group, Grammarly Business, Magento (Adobe Commerce), Otter.ai, Scribie and Trellix Endpoint Security; the list is alphabetical and does not imply a ranking. Across these tools the industries most often documented are Education, Professional Services, Financial Services, Healthcare. The most common documented use cases are Workflow automation, Sales pipeline management, Hybrid events, Team collaboration. Tools here are most often also filed under CRM Software, Webinar Software, Virtual Event Software, Cloud Storage. To compare options, open each profile and read the Decision Snapshot, the pricing and total cost sections, and the Gotchas, then check the alternatives listed for the products you are considering. Features, pricing and availability change, so confirm current details with each vendor before you decide.
These links use TechZella's existing product-to-taxonomy relationships. They are navigation aids, not independent endorsements.
Browse the current directory listings and open individual profiles for detailed feature, pricing and evidence information.
| # | Software / Tool | Best For | TechZella Score | User Rating | Pricing |
|---|---|---|---|---|---|
| 1 | Concrete CMS | Concrete CMS is an open-source, PHP-based content management system for websites and… | 8.2/10 | — | $0 / $4.99 |
| 2 | DatoCMS | DatoCMS is a cloud-based headless content management system with GraphQL content delivery,… | 8.2/10 | — | $0 / From €149 |
| 3 | Kit (formerly ConvertKit) | Kit is a web-based email marketing platform for creators, with newsletters, audience-growth… | 8.1/10 | — | $0 / $39 per month; about $33 per… |
| 4 | beehiiv | beehiiv combines newsletter publishing, email marketing, audience-growth tools, and monetization features with… | 8.0/10 | — | $0 / $49 |
| 5 | Flodesk | Flodesk is a web-based email marketing platform for designing and sending campaigns,… | 8.0/10 | — | $0 / $19 annually; $25 monthly |
| 6 | Kirby | Kirby is a self-hosted, file-based CMS with a customizable browser Panel, PHP… | 7.9/10 | — | €99 / €349 |
| 7 | Mailjet | Mailjet is a web-based email marketing and delivery platform with campaign tools,… | 7.9/10 | — | $0 / $9 |
| 8 | Sendlane | Sendlane is a web-based email marketing platform with campaign tools, behavioral automations,… | 7.8/10 | — | $100 / $0 |
| 9 | Zesty.io | Zesty.io is a cloud CMS for creating, managing, and publishing structured content… | 7.7/10 | — | $0 / $475 |
| 10 | Substack | Substack combines email newsletter publishing, a hosted publication site, subscriber management, and… | 7.6/10 | — | $0 / 10% of subscription revenue plus Stripe… |
Transmit Security’s Mosaic platform combines customer identity management, authentication, identity orchestration, fraud detection, and identity verification for business applications.
Starting at $200,000/year / year
Stytch provides APIs, SDKs, and configurable interfaces for authentication, authorization, and identity management in consumer and B2B applications.
$0 starting price / month
ZITADEL is an identity and access management platform for applications, with cloud and self-hosted deployment. It provides authentication, SSO, user management, and…
US$0 / month
Descope is a hosted customer identity and access management platform for adding authentication, user management, and authorization to applications. It provides visual…
$0 / month
Hanko provides authentication and user management for applications, including passkeys, passwords, multifactor authentication, social sign-in, and SAML SSO.
$0 / month
Corbado provides managed passkey authentication and authentication observability for organizations using existing identity systems. Its products support passkey rollout, login analysis, and…
Custom / Usage-based or contract-basedSpyse was an internet-asset search service for cybersecurity research, exposing data about domains, IP addresses, certificates, and related infrastructure. Current service availability…
MXToolbox Domain Health checks domain DNS, mail, web server, and blacklist status. Its web lookup is free with daily limits; paid plans…
$0 / month
ARIN Whois-RWS is a public REST API and web interface for querying ARIN registration records, including IP networks, ASNs, organizations, and contacts.
Whoxy provides APIs and web tools for current, historical, and reverse WHOIS searches, plus bulk lookups and domain data downloads.
$10 / per 5,000 queries