Work · alternatives · 2026

24 alternatives to OST File Viewer

Free OST Viewer to View Outlook OST File without Outlook

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. OST File Viewer launched in 2022; newer entries below may have overtaken it.

1
MailConverterTools PST Viewer▲8
Best Tool to Open, View, and Read PST Files without Outlook
2025 · its alternatives →
2
DRS OST Viewer Tool▲1
It is the most trusted and genuine OST file reader solution
2023 · its alternatives →
3
PST File Viewer▲3
Free PST Viewer Tool To Open and Read PST File
2022 · its alternatives →
4
MacSonik OST Viewer Pro▲5
Powerful OST File Viewer for Enterprises & IT
Jul 2026 · macsonik.com · its alternatives →
5
CubexSoft PST Viewer▲2
Free Tool to Open & View PST Files without using MS Outlook
2022 · its alternatives →
6
PST File Viewer Tool▲2
Best freeware software to open PST file without Outlook
2023 · its alternatives →
7
Sysinfo Linux OST Viewer▲6
Sysinfo Linux OST Viewer to read and save OST files on Linux
2023 · its alternatives →
8
OST Viewer Freeware▲3
Professional tool to view, open and read corrupt OST files
2023 · its alternatives →
9
DRS Softech PST Viewer Tool ▲5
Open and View PST Files Without Outlook Easily
Sep 2025 · drssoftech.com · its alternatives →
10
Sysinfo PST Viewer Pro▲2
Sysinfo PST Viewer pro view PST files without MS Outlook
2023 · its alternatives →
11
Mailward▲6
Open PST & OST files in your browser - private, no Outlook
Jul 2026 · pst.aivismonitor.com · its alternatives →
12
Office Viewer ▲12
Free View Office files without installing anything
2025 · its alternatives →
13
DRS PST Viewer Tool▲1
The utility allows you to access corrupt Outlook PST files.
2023 · its alternatives →
14
DRS OLM Viewer Tool ▲5
Free software that allows you to view OLM file emails
2023 · its alternatives →
15
OST to PST Converter Tool▲8
Converter Tools OST to PST Conversion with All Emails
2025 · convertertools.org · its alternatives →
16AL
A library for reading PST files (written in Go/Golang)▲20
2021 · github.com · its alternatives →
17
GoldyTools▲7
Ost to pst converter tool to convert ost to pst files
2025 · its alternatives →
18
Fileloom▲82
A free, ad-free Android viewer for all your files
May 2026 · play.google.com · its alternatives →
19
Osint tool that finds exposed files on domains▲58
hey guys, wanted to show one of my side projects i just made public. the idea is basically another osint tool for pentesters and bug bounty hunters. it watches certificate transparency logs and checks newly-seen domains for exposed stuff like .env files, open .git dirs, config files, db dumps and so on, and puts whatever it finds into a searchable db. you just search a domain (or part of one) and see what's exposed. it's read-only and free. one thing i've been thinking about adding is a way to register for certain keywords and get notified when something new shows up for that search. would…
Jul 2026 · search.cerast-intelligence.com · its alternatives →
20
OST to Office 365 Converter▲7
OST to Office 365 Converter to convert OST to Office 365
2023 · its alternatives →
21
Outlook Attachment Extractor Tool▲6
Download & extract Outlook attachments Effortlessly
Sep 2025 · systoolsgroup.com · its alternatives →
22AL
A library for reading PST emails (written in Go/Golang)▲13
2021 · github.com · its alternatives →
23OS
Open-source email helpdesk▲42
We've tried systems like OSTicket, OTRS etc, but never found anything to our liking. Most systems were cluttered, slow or too advanced. Brimir is simple but usefull.
2013 · github.com · its alternatives →
24
MailsDaddy Free EML Viewer Tool
Quickly Open and Read EML Files Independently
Jan 2026 · mailsdaddy.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →