Compare
GainTools Merge PST vs TrustVare OLM to Office 365 Converter
Short answer: Pick GainTools Merge PST if you want merging Outlook PST files on Windows; pick TrustVare OLM to Office 365 Converter if you want bulk OLM-to-Office365 migration. Both have a free plan.
GainTools Merge PSTgaintools-merge-pst
TrustVare OLM to Office 365 Convertertrustvare-olm-to-office365-converterWhich to pick
Pick GainTools Merge PST if you want…
- Merging Outlook PST files on Windows
Pick TrustVare OLM to Office 365 Converter if you want…
- Bulk OLM-to-Office365 migration
- OLM to Office 365 conversion
Side by side
- What it is
- GainTools Merge PST:GainTools Merge PST merges multiple Outlook PST files into one without data loss.
- TrustVare OLM to Office 365 Converter:Converts Mac Outlook OLM files to Office 365 accounts while preserving structure and attachments.
- Best for
- GainTools Merge PST:Merging Outlook PST files on Windows
- TrustVare OLM to Office 365 Converter:Bulk OLM-to-Office365 migration
- Who it’s for
- GainTools Merge PST:IT admins, support staff, and users who need to combine Outlook PST archives.
- TrustVare OLM to Office 365 Converter:IT teams, businesses and individuals migrating from Mac Outlook to Office 365.
- Pricing
- GainTools Merge PST:Freemium
- TrustVare OLM to Office 365 Converter:Freemium
- Free plan or trial
- GainTools Merge PST:Free trial
- TrustVare OLM to Office 365 Converter:Free trial
- Works with
- GainTools Merge PST:—
- TrustVare OLM to Office 365 Converter:Office 365
GainTools Merge PST features
- Combine multiple PSTs. Merge any number of ANSI or Unicode PST files into a single PST.
- Preserve folder structure. Keeps original email layout, folders, contacts, calendar and attachments intact.
- Password-protected PST support. Can merge PST files that are secured with a password.
- Selective folder merge. Choose to merge entire PSTs or only specific folders such as Inbox or Contacts.
- Custom output folders. Save the merged PST in a new folder or create separate folders per source PST.
- No file-size limit. Handles PST files of any size on supported Windows versions.
- Fast, accurate merging. Processes merges quickly while retaining all mail properties without corruption.
- Simple wizard UI. Step-by-step interface guides users through loading, selecting, and merging PSTs.
TrustVare OLM to Office 365 Converter features
- Full mailbox export. Transfers emails, contacts, calendars and attachments from OLM to Office 365.
- Preserves formatting. Keeps original folder structure, metadata and formatting intact.
- Bulk conversion. Exports unlimited OLM files in one operation.
- Automatic Office 365 login. Connects to the target account after entering credentials.
- Preview pane & log report. Shows data preview and generates a log of the exported items.
- No Outlook required. Runs as a standalone Windows app without installing Outlook.
GainTools Merge PST vs TrustVare OLM to Office 365 Converter FAQ
What is the difference between GainTools Merge PST and TrustVare OLM to Office 365 Converter?+
TrustVare OLM to Office 365 Converter: Converts OLM to Office 365 format, not PST merging.
Should I use GainTools Merge PST or TrustVare OLM to Office 365 Converter?+
Pick GainTools Merge PST if you want merging Outlook PST files on Windows. Pick TrustVare OLM to Office 365 Converter if you want bulk OLM-to-Office365 migration or OLM to Office 365 conversion.
Is GainTools Merge PST or TrustVare OLM to Office 365 Converter free?+
GainTools Merge PST has a free plan and paid plans. TrustVare OLM to Office 365 Converter has a free plan and paid plans.
On DevHunt
TrustVare OLM to Office 365 Converter
1 upvote · Launched on DevHunt on Jun 17, 2025
Based on each tool's website and DevHunt data. Details may change; check the official sites.