
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.

Which is more popular?
Based on our record, Obsidian seems to be more popular. It has been mentioned 1529 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | postaldatapi.com | obsidian.md |
| Pricing | ||
| Company | Startup from the United States · 1 - 9 employees · 2026 | Startup from the United States |
| 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 Obsidian 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
More videos
OBSIDIAN: Getting Started, Facts & Pricing
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using PostalDataPI and Obsidian. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of PostalDataPI yet. Be the first one to post
One thing to note: Notion bills itself as an Evernote competitor for personal users. It can be—but it's too much for most people, and its offline functionality isn't the best. If you love the idea of Notion, go right...
This app is the kind of thing that, if you’re into it, will have you exploring its various ins, outs, and add-ons for days and weeks on end. Obsidian uses the Markdown format for its notes (which means they can be...
However, it's important to note that Obsidian's whiteboard functionality is not as robust as dedicated collaboration tools. While it lacks real-time basic collaboration features, Obsidian compensates with its vibrant...
Recommendations tracked on public social media and blogs since March 2021.


Tracking PostalDataPI since Apr 2026.
The agents remember with Engram, but I need to remember too. Obsidian is my second brain: ideas, projects, and resources in one place. - Source: dev.to / 3 days ago
Obsidian, homepage (local plain-text Markdown storage, offline access, links/graph, featured community plugins). - Source: dev.to / 3 days ago
This is a decision page. Claude Code wrote it after reading a project's notes, and it shows the detail a chat question leaves out. I answer it in Obsidian. - Source: dev.to / 21 days ago
When comparing PostalDataPI and Obsidian, you can also consider the following products.

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We help businesses improve UX and data quality with a cutting edge address validation service.
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Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
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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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Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
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