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Best UPU POST*CODE API Alternatives in 2026

Updated

20 apps from address verification software ranked against UPU POST*CODE API on the same published basis.

  1. 1
    Smarty Address Verification Free trial AndroidapiiOSLinuxMac $46/mo8.9
    UPU POST*CODE API vs Smarty Address Verification
  2. 2
    Melissa Global Address Verification Free plan apiLinuxself-hostedWebWin $40/mo8.0
    UPU POST*CODE API vs Melissa Global Address Verification
  3. 3
    Lob Address Verification Free plan apiWeb $260/mo7.8
    UPU POST*CODE API vs Lob Address Verification
  4. 4
    PostGrid Address Verification Free trial apiself-hostedWeb $18/mo7.6
    UPU POST*CODE API vs PostGrid Address Verification
  5. 5
    Addrex Address Validation API Free plan apiWeb $39/mo7.3
    UPU POST*CODE API vs Addrex Address Validation API
  6. 6
    Hopewiser Address Validation Free trial apiLinuxself-hostedWebWin 7.1
    UPU POST*CODE API vs Hopewiser Address Validation
  7. 7
    Byteplant Address Validator Free trial apiWebWin 7.1
    UPU POST*CODE API vs Byteplant Address Validator
  8. 8
    Experian Address Validation Web 6.9
    UPU POST*CODE API vs Experian Address Validation
  9. 9
    Fetchify Free trial apiWeb £25/mo6.7
    UPU POST*CODE API vs Fetchify
  10. 10
    Loqate Address Verification Web 6.6
    UPU POST*CODE API vs Loqate Address Verification
  11. 11
    Addressfinder Free trial apiWeb A$19/mo6.6
    UPU POST*CODE API vs Addressfinder
  12. 12
    AddressZen Web 6.4
    UPU POST*CODE API vs AddressZen
  13. 13
    Google Maps Platform Address Validation API Web 6.1
    UPU POST*CODE API vs Google Maps Platform Address Validation API
  14. 14
    PostalUp Web 6.0
    UPU POST*CODE API vs PostalUp
  15. 15
    Addresser Web 5.9
    UPU POST*CODE API vs Addresser
  16. 16
    PostNL Address Validation API Web 5.9
    UPU POST*CODE API vs PostNL Address Validation API
  17. 17
    USPS Addresses API 5.8
    UPU POST*CODE API vs USPS Addresses API
  18. 18
    Addressr Web 5.7
    UPU POST*CODE API vs Addressr
  19. 19
    Ideal Postcodes Address Finder Web 5.4
    UPU POST*CODE API vs Ideal Postcodes Address Finder
  20. 20
    StreetVerify Address Verification API Web 5.4
    UPU POST*CODE API vs StreetVerify Address Verification API

UPU POST*CODE API alternatives compared

#AppScoreFree planFromRuns on
1Smarty Address Verification8.9No$46/moAndroid, API, iOS, Linux, Mac, self-hosted, Web, Windows
2Melissa Global Address Verification8.0Free plan$40/moAPI, Linux, self-hosted, Web, Windows
3Lob Address Verification7.8Free plan$260/moAPI, Web
4PostGrid Address Verification7.6No$18/moAPI, self-hosted, Web
5Addrex Address Validation API7.3Free plan$39/moAPI, Web
6Hopewiser Address Validation7.1No—API, Linux, self-hosted, Web, Windows
7Byteplant Address Validator7.1No—API, Web, Windows
8Experian Address Validation6.9No—Web
9Fetchify6.7No£25/moAPI, Web
10Loqate Address Verification6.6No—Web
11Addressfinder6.6NoA$19/moAPI, Web
12AddressZen6.4No—Web
13Google Maps Platform Address Validation API6.1No—Web
14PostalUp6.0No—Web
15Addresser5.9No—Web
16PostNL Address Validation API5.9No—Web
17USPS Addresses API5.8No——
18Addressr5.7No—Web
19Ideal Postcodes Address Finder5.4No—Web
20StreetVerify Address Verification API5.4No—Web
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Questions about UPU POST*CODE API alternatives

What is the best alternative to UPU POST*CODE API?

Smarty Address Verification, number 1 in address verification software with a score of 8.9 out of 10. The others here: Melissa Global Address Verification, Lob Address Verification, PostGrid Address Verification and 16 more.

What is the best free alternative to UPU POST*CODE API?

Melissa Global Address Verification is the best-ranked alternative with a free plan. 3 of the 20 alternatives here publish a free plan on their own pricing pages.

How are these alternatives ranked?

Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation.