Head-to-head · Fax Server Software
OpenText Fax (RightFax) vs Esker VSI-FAX
OpenText Fax (RightFax) leads on 0 checks, Esker VSI-FAX on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreOpenText Fax (RightFax) · 9.4/10
- Free trialonly Esker VSI-FAX
OpenText Fax (RightFax) scores higher on our rubric for fax server software: 9.4 against 9.1 out of 10; our editors rank them #1 and #2.
On deployment model, OpenText Fax (RightFax) gives you Hybrid where Esker VSI-FAX offers On_premises.
OpenText Fax (RightFax) is the better fit for large enterprises needing broad fax automation. Esker VSI-FAX is the better fit for high-volume enterprise fax operations.
- OpenText Fax (RightFax) fits best
Large enterprises needing broad fax automation
- Esker VSI-FAX fits best
High-volume enterprise fax operations
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.
Side by side
| Feature | OpenText Fax (RightFax) 9.4/10 Visit ↗ | Esker VSI-FAX 9.1/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 9.4 | 9.1 |
| Ranking | #1 in Fax Server Software | #2 in Fax Server Software |
| Best for | Large enterprises needing broad fax automation | High-volume enterprise fax operations |
| Pricing model | Paid | Paid |
| Starting price | — | Pricing on request · 30-day trial |
| Free plan | — | Not checked yet |
| Free trial | — | 30 days |
| Deployment | Cloud, Self-hosted, Desktop, Mobile | Self-hosted |
| Platforms | Web, iOS, Android, Windows | Windows, Linux |
| Support | Email, Phone, Tickets, Community, Docs · 24/7 | Email, Docs |
| Compliance | SOC 2, ISO 27001, HIPAA, PCI DSS | ISO 27001 |
| Integrations | 1,000+ integrations | 7 integrations |
| Built for | Mid-market, Enterprise | Small business, Mid-market, Enterprise |
| Features OpenText Fax (RightFax) 4/4 · Esker VSI-FAX 4/4 | ||
| Modem or gateway support | ✓ | ✓ |
| Fax routing rules | ✓ | ✓ |
| Email fax workflow | ✓ | ✓ |
| Searchable fax archive | ✓ | ✓ |
| Specs | ||
| Deployment model | Hybrid | On_premises |
| Concurrent fax channels | Not checked yet | Not checked yet |
| Our review | ||
| Pros |
|
|
| Cons |
|
|
| Our verdict | OpenText Fax, formerly RightFax, is enterprise fax server software for sending, receiving, tracking, and managing digital faxes. It is designed for document-intensive organizations, including healthcare, finance, government, and legal… Read the review → |
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 → |
Strengths and trade-offs
OpenText Fax (RightFax) — where it wins
- Supports on-premises, hybrid, and private-cloud deployment
- Connects fax workflows with healthcare, ERP, CRM, and collaboration systems
- Adds routing, analytics, audit trails, APIs, and AI-assisted processing
Where it doesn't
- Paid product with sales-led purchasing
- Feature and channel capacity vary by edition and configuration
- May exceed the needs of organizations with simple fax requirements
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
- OpenText Fax (RightFax)9.4/10 · Paid
A deployment-flexible fax platform for complex, regulated document workflows.
Visit OpenTextFull verdict → - 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 →
More comparisons
- OpenText Fax (RightFax) vs FaxCore
- OpenText Fax (RightFax) vs HylaFAX Enterprise
- OpenText Fax (RightFax) vs Faxination On-Premise
- OpenText Fax (RightFax) vs OpenTouch Fax Center
- OpenText Fax (RightFax) vs FaxFacts
- OpenText Fax (RightFax) vs Zetafax
- Esker VSI-FAX vs FaxCore
- Esker VSI-FAX vs HylaFAX Enterprise
All fax server software comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update