
Postio.co.uk
Ideal postcodes
Fetchify
Smarty
Data8 UK
ZIP Code API
Data8 UK PredictiveAddress
The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.

IMDb
Trakt.tv
Simkl
JustWatch
Reelgood
Criticker
TV Time
Letterboxd is a social site for sharing your taste in film, now in public beta.

Which is more popular?
Based on our record, Letterboxd seems to be more popular. It has been mentioned 149 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | postaldatapi.com | letterboxd.com |
| Pricing | — | |
| Company | Startup from the United States · 1 - 9 employees · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


PostalDataPI is a global postal code validation and enrichment API covering 240+ countries and territories. One API, one key, one flat rate — $0.000028 per query with no tiers or subscriptions. What you get back: Up to 18 metadata fields per postal code — city, state/region, coordinates,...
No description of Letterboxd yet.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
PostalDataPI Now Returns 18 Fields Per Postal Code — for 240+ Countries
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External articles and on-site reviews we used to compare the two products.


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Letterboxd: Letterboxd is a social media platform for movie lovers that allows users to rate and review films, create watchlists, and follow other users with similar tastes. Its recommendation algorithm is known for...
Recommendations tracked on public social media and blogs since March 2021.


Tracking PostalDataPI since Apr 2026.
5. Best Submissions can display their [Letterboxd Accts] the following week. Source: almost 3 years ago
Letterboxd is a site/app for logging movies that you've watched. I had always wanted a way to show my most recently-watched movies on my personal website. Source: almost 3 years ago
On the social media site for film geeks that is Letterboxd, a sizeable amount of the community has an official, unofficial horrorthon each year called HoopTober, helmed by the benevolent Cinemonster. Source: about 3 years ago
When comparing PostalDataPI and Letterboxd, you can also consider the following products.

Fast UK address, email & phone validation APIs for developers. Official Royal Mail PAF data. Pay as you go, 100 free lookups.
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We help businesses improve UX and data quality with a cutting edge address validation service.
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Automatically track TV shows & movies you're watching.
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Fetchify delivers fast, accurate address, email, phone and bank validation tools that help businesses capture clean, verified customer data, reduce failed deliveries and improve checkout experiences worldwide.
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Simkl is a TV, anime, and movie tracker that keeps a history of all the shows and movies you watch in one, central location. It’s a mobile app, a website, Google Chrome extension to keep track of everything you watch and integrates with many TV apps
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