Best OpenText Core Email Threat Protection Alternatives in 2026
The top OpenText Core Email Threat Protection alternatives are Mimecast Email Security, Sophos Email and Darktrace / EMAIL: 15 cloud email security our editors would look at instead of OpenText Core Email Threat Protection, in our ranking order.
OpenText Core Email Threat Protection: A Microsoft 365-focused gateway combining filtering, remediation and centralized oversight. Where it falls short: subscription pricing requires contacting OpenText or a partner.
Switching from OpenText Core Email Threat Protection? For most cloud email security buyers the best OpenText Core Email Threat Protection alternative is Mimecast Email Security, built for organizations needing broad integrations. On a budget, Microsoft Defender for Business starts at $3/user/mo. Sublime Security has a free plan.
Why People Look for an OpenText Core Email Threat Protection Alternative
- Subscription pricing requires contacting OpenText or a partner
- Email platform coverage centers on Microsoft 365
- Support is provided through tickets, even with 24/7 availability
Quick Picks by What You Need
- Best overallMimecast Email Security9.3
Organizations needing broad integrations
Visit Mimecast Email Security - Lowest priceMicrosoft Defender for Business7.9
Paid plans from $3/user/mo
Visit Microsoft Defender for Business - Best free optionSublime Security7.9
Has a free plan
Visit Sublime Security
All 15 OpenText Core Email Threat Protection Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
-
Best forOrganizations needing broad integrations
- Better than OpenText Core Email Threat Protection:
- Editor score 9.3 vs 8.6
Broad email protection with gateway, API, continuity, and 300 integrations.
9.3/10★★★★★Visit Mimecast -
Best forFull-featured cloud email defense
- Better than OpenText Core Email Threat Protection:
- Editor score 9.2 vs 8.6
A broad cloud defense stack for organizations securing Microsoft 365 or Google Workspace mail.
9.2/10★★★★★Visit Sophos -
Best forTeams seeking behavioral AI and cross-domain protection
- Better than OpenText Core Email Threat Protection:
- Editor score 9.1 vs 8.6
Broad email and collaboration protection with behavioral detection and automated response.
9.1/10★★★★★Visit Darktrace -
Best forEmail and collaboration threat protection
- Better than OpenText Core Email Threat Protection:
- Editor score 9.0 vs 8.6
Layered email and collaboration protection with quote-based plans and a 14-day trial.
9.0/10★★★★☆Visit Check Point -
Best forFlexible Microsoft 365 or Google Workspace security
- Better than OpenText Core Email Threat Protection:
- Editor score 8.9 vs 8.6
Deep email threat detection and remediation for Microsoft 365, Google Workspace, and Exchange.
- Data loss prevention
- Post-delivery remediation
8.9/10★★★★☆Visit Cloudflare -
Best forTeams seeking managed advanced email threat response
- Better than OpenText Core Email Threat Protection:
- Editor score 8.8 vs 8.6
Layered cloud email defense with managed 24/7 incident response.
8.8/10★★★★☆Contact Fortinet -
Best forEstablished cloud gateway protection
- Better than OpenText Core Email Threat Protection:
- Editor score 8.7 vs 8.6
Established cloud gateway with layered protection for major business mail platforms.
8.7/10★★★★☆Visit Symantec -
Best forCloud gateway filtering for mid-market teams
A cloud gateway for filtering business email, with strong quarantine and malware analysis controls.
8.4/10★★★★☆Visit Forcepoint -
Best forMicrosoft 365 security plus backup and training
A broad Microsoft 365 security suite that adds backup, continuity and training.
Pricing on request · 14-day trial Our Hornetsecurity 365 Total Protection verdict → Visit Hornetsecurity8.3/10★★★★☆Visit Hornetsecurity -
Best forGateway and mailbox remediation across platforms
A gateway and mailbox-remediation suite for Microsoft 365 and Google Workspace.
- Data loss prevention
- Post-delivery remediation
8.1/10★★★★☆Visit VIPRE -
Best forFlexible cloud or self-hosted protection
Flexible cloud or self-hosted email protection with broad filtering and quarantine controls.
8.0/10★★★★☆Visit Mailinblack -
Best forOrganizations needing gateway filtering across mail systems
CloudFilter combines inbound and outbound filtering with quarantine, DMARC, and DLP controls.
7.9/10★★★★☆Visit Mailprotector -
Best forCompliance-focused email archiving
A compliance-focused archive for retention, legal holds, eDiscovery, and email search.
7.9/10★★★★☆Visit Barracuda -
Best forSmall-business endpoint security buyers
Affordable, cross-platform endpoint protection with ransomware disruption and EDR.
7.9/10★★★★☆Visit Microsoft -
Best forBudget-conscious teams wanting advanced automation
A feature-rich, automation-focused email security platform with a free starting tier.
7.9/10★★★★☆Try Sublime Security
OpenText Core Email Threat Protection Alternatives: Common Questions
What is the best alternative to OpenText Core Email Threat Protection?
Mimecast Email Security: #1 in our Cloud Email Security ranking, with an editor score of 9.3 out of 10. Broad email protection with gateway, API, continuity, and 300 integrations.
Is there a free alternative to OpenText Core Email Threat Protection?
Yes. Sublime Security has a free plan or a free tier.
Why do people look for OpenText Core Email Threat Protection alternatives?
Subscription pricing requires contacting OpenText or a partner; Email platform coverage centers on Microsoft 365; Support is provided through tickets, even with 24/7 availability.
How do I switch from OpenText Core Email Threat Protection?
Snapshot or back up the data and configs on your OpenText Core Email Threat Protection server. Create the new server with the same operating system and size, and add your SSH key. Copy the data across (rsync or your backup tool) and reinstall your apps or containers. Move the DNS records or IP references to the new server, test it, then cancel OpenText Core Email Threat Protection.
How to Switch from OpenText Core Email Threat Protection
- Snapshot or back up the data and configs on your OpenText Core Email Threat Protection server.
- Create the new server with the same operating system and size, and add your SSH key.
- Copy the data across (rsync or your backup tool) and reinstall your apps or containers.
- Move the DNS records or IP references to the new server, test it, then cancel OpenText Core Email Threat Protection.
OpenText Core Email Threat Protection vs Each Alternative
| # | Tool | Free plan | Paid from | Score |
|---|---|---|---|---|
| 8 | OpenText Core Email Threat Protection | 8.6 | ||
| 1 | Mimecast Email Security | No | 9.3 | |
| 2 | Sophos Email | No | 9.2 | |
| 3 | Darktrace / EMAIL | No | 9.1 | |
| 4 | Check Point Email Security | No | 9.0 | |
| 5 | Cloudflare Email Security (formerly Area 1) | No | 8.9 | |
| 6 | Perception Point Advanced Email Security | 8.8 | ||
| 7 | Symantec Email Security.cloud | 8.7 | ||
| 8 | Forcepoint Email Security Cloud | 8.4 | ||
| 9 | Hornetsecurity 365 Total Protection | No | 8.3 | |
| 10 | VIPRE Email Security | 8.1 | ||
| 11 | Mailinblack Protect | 8.0 | ||
| 12 | Mailprotector | 7.9 | ||
| 13 | Barracuda Message Archiver | No | 7.9 | |
| 14 | Microsoft Defender for Business | No | $3/user/mo | 7.9 |
| 15 | Sublime Security | Yes | 7.9 |
Head-to-Head
- OpenText Core Email Threat Protection vs Mimecast Email Security
- OpenText Core Email Threat Protection vs Sophos Email
- OpenText Core Email Threat Protection vs Darktrace / EMAIL
- OpenText Core Email Threat Protection vs Check Point Email Security
- OpenText Core Email Threat Protection vs Cloudflare Email Security (formerly Area 1)
- OpenText Core Email Threat Protection vs Perception Point Advanced Email Security
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update