E-Signature Software · reliability comparison
Dropbox Sign vs Formstack Sign: which is more reliable? (2026)
Dropbox Sign is more reliable than Formstack Sign, scoring 90.9 vs 74.1 out of 100. Over the last 90 days Dropbox Sign reported 2 incidents and Formstack Sign reported 6, with effective uptime of 99.94% and 99.74% respectively. Dropbox Sign resolves incidents faster on average (3h 48m).
Data updated Nov 1, 2026 · How we score
| Metric | Dropbox Sign | Formstack Sign |
|---|---|---|
| Reliability score | 90.9 | 74.1 |
| Rank (e-signature tools) | #6 | #8 |
| Uptime (90 days) | 99.94% | 99.74% |
| Incidents (90 days) | 2 | 6 |
| Partial / major outages | 0 | 1 |
| Avg time to resolve | 3h 48m | 10h 9m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Dropbox Sign and Formstack Sign differ
- Formstack Sign reported 3× as many incidents as Dropbox Sign over the last 90 days (6 vs 2).
- Formstack Sign had 1 partial or major outage, compared with 0 for Dropbox Sign.
- Dropbox Sign fixes problems faster: 3h 48m on average, against 10h 9m for Formstack Sign (2.7× quicker).
- Dropbox Sign's longest outage on record lasted 3h 12m (Jan 2, 2026); Formstack Sign's lasted 45m (Sep 29, 2026).
90-day uptime
Dropbox Sign
Formstack Sign
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Dropbox Sign incidents
- Degraded performanceAug 31, 2026 · resolved in 53m
Affected: Send signature requests, Document signing through Dropbox Sign and Fax, Embedded signing through Dropbox Sign
- Degraded performanceAug 21, 2026 · resolved in 6h 43m
We are currently experiencing issues with our Salesforce integration
Affected: Salesforce
Recent Formstack Sign incidents
- InformationalOct 9, 2026 · resolved in <1m
Formstack Sign: Some Documents finalized without audit pages
Affected: Documents
- Degraded performanceOct 5, 2026 · resolved in 2h
Sign Integration Authentication Issues
Affected: API & Document Generation, Documents
- Degraded performanceSep 30, 2026 · resolved in 6h 13m
Delayed Documents Deliveries After Sign Completion
Affected: API & Document Generation
- Degraded performanceSep 29, 2026 · resolved in 1d 7h
Formstack Sign API Authentication Issues
Affected: API, Documents
- Partial outageSep 29, 2026 · resolved in 45m
Documents with Sign Delivery are failing
Affected: API & Document Generation
- InformationalSep 28, 2026 · resolved in 9h 59m
Formstack Sign authentication migration
Affected: Main Application, API