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Best Sentinel Alternatives in 2026

Updated

20 platforms from API monitoring tools ranked against Sentinel on the same published basis.

  1. 1
    Site24x7 API Monitoring Free plan AndroidapiiOSLinuxMac $109/mo8.0
    Sentinel vs Site24x7 API Monitoring
  2. 2
    APIContext Free plan LinuxMacWebWin $29/mo7.9
    Sentinel vs APIContext
  3. 3
    Postman Free plan extensionLinuxMacWebWin $9/mo7.8
    Sentinel vs Postman
  4. 4
    Watchlog Free plan apiLinuxself-hostedWebWin $4.99/mo7.8
    Sentinel vs Watchlog
  5. 5
    Loadster Synthetic Monitoring Free plan apiextensionself-hostedWeb $77/mo7.7
    Sentinel vs Loadster Synthetic Monitoring
  6. 6
    Checkly Free plan apiLinuxWeb $24/mo7.6
    Sentinel vs Checkly
  7. 7
    HostTracker Free plan apiWeb $4.08/mo7.6
    Sentinel vs HostTracker
  8. 9
    Sysmos Free plan apiLinuxWeb $29/mo7.6
    Sentinel vs Sysmos
  9. 10
    CyberPing Free plan apiself-hostedWeb $49/mo7.5
    Sentinel vs CyberPing
  10. 11
    Uptara Free plan apiWeb $15/mo7.5
    Sentinel vs Uptara
  11. 12
    Assertible Free plan apiWeb $25/mo7.4
    Sentinel vs Assertible
  12. 13
    Runscope Free trial apiLinuxMacself-hostedWeb $79/mo7.3
    Sentinel vs Runscope
  13. 14
    Dotcom-Monitor Free plan WebWinLinuxiOSAndroid $13.33/mo7.2
    Sentinel vs Dotcom-Monitor
  14. 15
    Tallwatch Free plan apiLinuxMacWebWin $11.99/mo7.2
    Sentinel vs Tallwatch
  15. 16
    UptimeRobot Free plan AndroidiOS $9/mo7.2
    Sentinel vs UptimeRobot
  16. 17
    ObserveOne API Monitoring Free plan apiextensionself-hostedWeb $6/mo7.0
    Sentinel vs ObserveOne API Monitoring
  17. 18
    Uptrends Free trial AndroidapiiOSLinuxWeb $42/mo7.0
    Sentinel vs Uptrends
  18. 19
    Signalog Free plan apiWeb $19/mo6.9
    Sentinel vs Signalog
  19. 20
    Oh Dear Free trial Web €15/mo6.8
    Sentinel vs Oh Dear
  20. 21
    Sematext Synthetics Free trial apiLinuxself-hostedWebWin $2/mo6.7
    Sentinel vs Sematext Synthetics

Sentinel alternatives compared

#PlatformScoreFree planFromRuns on
1Site24x7 API Monitoring8.0Free plan$109/moAndroid, API, iOS, Linux, Mac, Web, Windows
2APIContext7.9Free plan$29/moLinux, Mac, Web, Windows
3Postman7.8Free plan$9/moBrowser, Linux, Mac, Web, Windows
4Watchlog7.8Free plan$4.99/moAPI, Linux, self-hosted, Web, Windows
5Loadster Synthetic Monitoring7.7Free plan$77/moAPI, Browser, self-hosted, Web
6Checkly7.6Free plan$24/moAPI, Linux, Web
7HostTracker7.6Free plan$4.08/moAPI, Web
9Sysmos7.6Free plan$29/moAPI, Linux, Web
10CyberPing7.5Free plan$49/moAPI, self-hosted, Web
11Uptara7.5Free plan$15/moAPI, Web
12Assertible7.4Free plan$25/moAPI, Web
13Runscope7.3$79/moAPI, Linux, Mac, self-hosted, Web, Windows
14Dotcom-Monitor7.2Free plan$13.33/moWeb, Windows, Linux, iOS, Android
15Tallwatch7.2Free plan$11.99/moAPI, Linux, Mac, Web, Windows
16UptimeRobot7.2Free plan$9/moAndroid, iOS
17ObserveOne API Monitoring7.0Free plan$6/moAPI, Browser, self-hosted, Web
18Uptrends7.0No$42/moAndroid, API, iOS, Linux, Web, Windows
19Signalog6.9Free plan$19/moAPI, Web
20Oh Dear6.8No€15/moWeb
21Sematext Synthetics6.7No$2/moAPI, Linux, self-hosted, Web, Windows
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Questions about Sentinel alternatives

What is the best alternative to Sentinel?

Site24x7 API Monitoring, number 1 in API monitoring tools with a score of 8.0 out of 10. The others here: APIContext, Postman, Watchlog and 16 more.

What is the best free alternative to Sentinel?

Site24x7 API Monitoring is the best-ranked alternative with a free plan. 16 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on.