GainTools OST to PST Converter Review: How I Safely Migrated Years of Work Emails
By Varsha Sethi 12-06-2026 17
Overview
Email acts as the foundation for my everyday communication as a remote worker. I have managed numerous projects for clients in various nations throughout the years. My Outlook email included everything from contracts and crucial documents to project talks and invoices. Accessing and moving old OST files is a problem that many Outlook users have and I recently encountered it while updating my work server.
I have a number of OST files from old Exchange accounts and Outlook profiles. The emails contained important information that I could not afford to lose, even if some of these accounts were no longer in use. I tried GainTools OST to PST Converter after looking into a few different options. This review discusses the software's features, cost, benefits, drawbacks and whether or not I believe it is worthwhile to buy.
Why I Required an OST to PST Conversion
I regularly switch gadgets and upgrade my workspace, just like a lot of independent contractors and remote workers. During one such move, I found that because the original Exchange accounts were no longer accessible, Outlook could not open some of my old OST files.
Nearly four years' worth of client correspondence, including project approvals, payment records and shared documents, were included in one specific OST file. My company might have faced serious issues if I had lost access to that data.
I required a remedy that could:
- OST files can be converted to PST format.
- Keep attachments and email folders safe.
- You can work without the original Exchange account.
- Effectively manage big mailbox files.
- Be simple to use even for non-technical people.
I tested the program and discovered that it complied with all of these specifications.
How to convert OST to PST using this tool
The installation process was simple. Installing the software barely required a few clicks and a speedy download.
The program's UI seemed straightforward when I first started it. This tool did not overwhelm me with complex options, in contrast to many sophisticated data migration applications. Even users with little technical expertise may utilize it because of its straightforward navigation.
There were three fundamental steps in the process:
- Choose the OST file.
- View mailbox information.
- Export the file in PST format.
The entire process seemed simple to comprehend and straightforward.
My Conversion Experience in Real Life
I chose an OST file that was about 8 GB in size to test the program. The file included:
- Over 25,000 emails.
- There are hundreds of attachments.
- Multiple contact folders.
- Multiple-year calendar entries.
There were no mistakes made throughout the scanning procedure. The preview feature was what most impressed me. I could check emails and folder structures to make sure the data was intact before converting the file.
The program successfully created a PST file after starting the conversion. After being imported into Outlook, every folder looked precisely like it did in the original mailbox.
Attachments opened properly, the folder hierarchy didn't alter and email metadata like subject lines, timestamps and sender details were kept.
I was reassured by this that my business communications had been securely transferred.
Features That I Liked The Most
Full Conversion of OST to PST
The program maintains data integrity and mailbox structure when converting OST files into Outlook PST format.
Orphaned OST Files are supported
Its compatibility with OST files that are not linked to Exchange Server accounts is one of its main benefits.
Functionality Preview
Before beginning the conversion process, users can see mailbox content, which aids in data verification.
Maintains the Folder Structure
Emails are easy to find because the original folder hierarchy is preserved after conversion.
Manages Big OST Files
The program handled a sizable mailbox file without experiencing any performance problems throughout my testing.
Sustains Email Properties
After migration, crucial email information including recipients, timestamps, formatting and attachments are preserved.
Easy to Use Interface
Both novice and expert users can utilize the application because to its simple and well-organized UI.
Cost and License Plans
The software had several licensing choices available at the time of my purchase to meet various user needs.
Individual License
Ideal for single users who need to use a single machine to convert OST files.
Priced at $39
Business License
Intended for professionals and small companies in need of commercial usage privileges.
Priced at $99
Enterprise License
Designed to help IT departments and enterprises manage conversions across many systems.
Priced at $299
I downloaded the trial version to see how it worked before making a purchase. I decided on the Business License after making sure it could effectively retrieve and convert my mailbox data.
Reasons for Purchasing the Business License
I frequently handle client communications and archived mailbox data as a remote worker. The flexibility and commercial usage privileges offered by the business license matched my job requirements.
I wanted to invest in a license that would support my long-term professional demands, even if the Personal License would have been less expensive.
It is always advisable to check the official website for the most recent licensing rates and deals, as pricing may change over time.
Benefits
- Simple setup and installation.
- The interface is easy to use.
- Supports OST files that are lost or inaccessible.
- Preserves the structure of the original mailbox.
- Maintains email characteristics and attachments.
- Consistent performance when dealing with big OST files.
- The option to preview before converting.
- Both personal and professional users will find it suitable.
Improvement Opportunities
There are several places where software could be improved and no program is flawless.
- The Mac version isn't available right now.
- Depending on the size of the file, conversion speed may vary.
- More sophisticated filtering options might be added.
These restrictions, however, had little effect on my entire experience.
Reliability and Performance
I was really impressed with the software's performance. There were no freezes, crashes or conversion difficulties during my testing.
All of the crucial mailbox data was preserved when the converted PST file was successfully loaded into Outlook. Reliability frequently takes precedence over sophisticated capabilities for users managing crucial business communications and this product excelled in that area.
Final Decision
I can state with confidence that the software met my needs after migrating years' worth of client emails and project discussions.
The conversion procedure was straightforward, precise, and safe. Most significantly, it made it possible for me to retrieve essential email correspondence that would have otherwise remained hidden inside unreadable OST files.
This solution can greatly ease Outlook data migration and recovery operations, regardless of whether you are an IT administrator, remote worker, freelancer or business owner.
Rating
4.8 out of 5
- Usability: 5/5
- Performance: 4.8/5
- Data accuracy: 5/5
- Value for money: 4.7/5
- Dependability: 4.8/5
Suggestion
Anyone searching for a reliable method to recover and transfer Outlook mailbox data should definitely use this OST conversion program. It effectively saved years' worth of crucial emails, attachments and company records without data loss, based on my own experience as a remote worker.
This program is unquestionably worthwhile if safeguarding important Outlook data is your top concern.
