Side by side
DataNumen Exchange Recovery vs PST Walker
Both stand on email recovery software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free trial Windows
Choose DataNumen Exchange Recovery if you need Windows software to recover OST data and export it to PST, with batch processing and preview available. Look elsewhere if you need recovery for PST, MBOX, or EDB files, or if you require a free plan.
Visit DataNumen Exchange Recovery Free plan Windows
PST Walker combines Outlook file access, recovery, search, and conversion, with a demo for limited exports. Check the Windows and .NET requirements and compare license terms, including maintenance duration, before selecting a plan.
Visit PST WalkerThe facts
| DataNumen Exchange Recovery | PST Walker | |
|---|---|---|
| Free plan | A free trial | Yes |
| Open source | Not published | No |
| Runs on | Windows | Windows |
| Lowest paid plan | DataNumen Exchange Recovery — 1 user license: $199.95, paid once | Lite License: $32.95 a year |
| Plans published | 1 | 7 |
| Maker | Not published | Not published |
| Website | datanumen.com | pstwalker.com |
| On email recovery software | #9 of 33 | #5 of 33 |
DataNumen Exchange Recovery: what it does well
- Converts orphaned or corrupt OST files into PST files.
- Supports Exchange 5.0 and later, plus Exchange ActiveSync.
- Recovers deleted objects and processes oversized 2GB OST files.
- Supports batch recovery and preview before export.
- Offers a free download and a Best Recovery Guarantee.
What to know first
- Runs on Windows only.
- Recovers OST files, not PST, MBOX, or EDB files.
- No free plan; the one-user license is 199.95 USD.
PST Walker: what it does well
- Opens PST, OST, MSG, and EML files without Outlook.
- Can recover deleted emails, contacts, and calendar entries.
- Search includes Boolean queries and filters.
- Maker says conversion processes files locally.
- Licenses use one-time payments without automatic recurring charges.
What to know first
- Demo export is limited to 15 emails per folder.
- Windows and .NET Framework 4.7.2 or later are required.
- Lite costs $32.95 a year.
- Perpetual licenses stop receiving updates after maintenance expires.
Alternatives to DataNumen Exchange Recovery Alternatives to PST Walker The whole list

