Head-to-head · Fax Server Software
Esker VSI-FAX vs OpenTouch Fax Center
Esker VSI-FAX leads on 0 checks, OpenTouch Fax Center on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreEsker VSI-FAX · 9.1/10
- Free trialonly Esker VSI-FAX
Esker VSI-FAX scores higher on our rubric for fax server software: 9.1 against 8.5 out of 10; our editors rank them #2 and #6.
Esker VSI-FAX is the better fit for high-volume enterprise fax operations. OpenTouch Fax Center is the better fit for organizations using OpenTouch infrastructure.
- Esker VSI-FAX fits best
High-volume enterprise fax operations
- OpenTouch Fax Center fits best
Organizations using OpenTouch infrastructure
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Side by side
| Feature | Esker VSI-FAX 9.1/10 Visit ↗ | OpenTouch Fax Center 8.5/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 9.1 | 8.5 |
| Ranking | #2 in Fax Server Software | #6 in Fax Server Software |
| Best for | High-volume enterprise fax operations | Organizations using OpenTouch infrastructure |
| Pricing model | Paid | Paid |
| Starting price | Pricing on request · 30-day trial | Pricing on request |
| Free plan | Not checked yet | Not checked yet |
| Free trial | 30 days | — |
| Deployment | Self-hosted | Self-hosted, Desktop |
| Platforms | Windows, Linux | Web, Windows |
| Support | Email, Docs | Docs |
| Compliance | ISO 27001 | HIPAA, SSO/SAML |
| Integrations | 7 integrations | 10 integrations |
| Built for | Small business, Mid-market, Enterprise | Enterprise |
| Features Esker VSI-FAX 4/4 · OpenTouch Fax Center 4/4 | ||
| Modem or gateway support | ✓ | ✓ |
| Fax routing rules | ✓ | ✓ |
| Email fax workflow | ✓ | ✓ |
| Searchable fax archive | ✓ | ✓ |
| Specs | ||
| Deployment model | On_premises | On_premises |
| Concurrent fax channels | Not checked yet | Not checked yet |
| Our review | ||
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| Our verdict | Esker VSI-FAX is server-based fax software for small and large businesses that need to send, receive, route, and archive faxes through enterprise workflows. It supports high-volume production faxing from enterprise applications,… Read the review → |
OpenTouch Fax Center is an on-premises fax-over-IP solution for enterprises moving fax workflows onto IP networks. It supports sending and receiving through secure web access, SMTP email systems, desktop applications using a virtual fax… Read the review → |
Strengths and trade-offs
Esker VSI-FAX — where it wins
- High-volume production faxing with scheduling, batching, and least-cost routing
- Advanced inbound routing with DNIS, DID, and DTMF support
- Broad integration options across email, ERP, APIs, SDKs, and Fax over IP
Where it doesn't
- Product pricing is available through contact with sales
- On-premises deployment calls for server and fax infrastructure planning
- Advanced capabilities may require technical administration and integration work
OpenTouch Fax Center — where it wins
- Secure web, email, desktop, and T.37 fax workflows
- Detailed inbound routing with searchable histories and audit logs
- Supports SIP/T.38, G.711, VMware, and Hyper-V
Where it doesn't
- Pricing requires contacting sales
- On-premises deployment may not suit cloud-first teams
- Strongest integrations are concentrated in the OpenTouch ecosystem
- Esker VSI-FAX9.1/10 · Pricing on request · 30-day trial
A mature on-premises fax server for high-volume workflows and complex routing.
Visit EskerFull verdict → - OpenTouch Fax Center8.5/10 · Pricing on request
A capable on-premises fax server for organizations built around OpenTouch infrastructure.
Visit siteFull verdict →
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- Esker VSI-FAX vs Faxination On-Premise
- Esker VSI-FAX vs FaxFacts
- Esker VSI-FAX vs Zetafax
- FaxCore vs OpenTouch Fax Center
All fax server software comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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