Head-to-head · External Audit Software
AttestWork vs GAASFlow
AttestWork leads on 0 checks, GAASFlow on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.
Our verdict
- Highest scoreAttestWork · 8.5/10
AttestWork scores higher on our rubric for external audit software: 8.5 against 7.2 out of 10; our editors rank them #3 and #5.
AttestWork is the better fit for small firms seeking affordable automation. GAASFlow is the better fit for firms wanting structured web audit workpapers.
- AttestWork fits best
Small firms seeking affordable automation
- GAASFlow fits best
Firms wanting structured web audit workpapers
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Side by side
| Feature | AttestWork 8.5/10 Visit ↗ | GAASFlow 7.2/10 Visit ↗ |
|---|---|---|
| At a glance | ||
| Editor score | 8.5 | 7.2 |
| Ranking | #3 in External Audit Software | #5 in External Audit Software |
| Best for | Small firms seeking affordable automation | Firms wanting structured web audit workpapers |
| Pricing model | Paid | Paid |
| Starting price | Not published | Not published |
| Free plan | — | — |
| Free trial | — | — |
| Free trial length | 5 days · no card needed | 7 days · no card needed |
| Deployment | Cloud, Browser extension | Cloud |
| Platforms | Web | Web |
| Support | Docs | Email, Live chat, Docs |
| Built for | Small business, Mid-market, Enterprise | Small business, Mid-market |
| Features AttestWork 5/5 · GAASFlow 5/5 | ||
| Workpaper templates | ✓ | ✓ |
| Evidence collection | ✓ | ✓ |
| Review workflows | ✓ | ✓ |
| Audit reporting | ✓ | ✓ |
| Client portal | ✓ | ✓ |
| Specs | ||
| Deployment | Web | Web |
| Our review | ||
| Pros |
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| Cons |
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| Our verdict | AttestWork is audit and attest engagement software for CPA firms handling audit, review, compilation, preparation, agreed-upon procedures, and examination engagements. Its workspace brings together engagement setup, procedure templates,… Read the review → |
GAASFlow is web-based audit engagement software for independent and growing CPA firms. It brings trial-balance importing, guided workpapers, evidence attachments, client PBC requests, review notes, electronic sign-offs, document… Read the review → |
Strengths and trade-offs
AttestWork — where it wins
- Unlimited attest engagements on Professional and Premium plans
- OCR evidence handling, risk assessment, sampling, and analytics
- Client portal, workpapers, review notes, and sign-off workflows
Where it doesn't
- No free plan beyond the five-day Trial
- Premium features require a higher monthly or annual tier
- Enterprise and Gov pricing is customized rather than published
GAASFlow — where it wins
- Guided workpapers cover procedures, testing, exceptions, conclusions, and attachments
- Review notes, electronic sign-offs, locking, and partner approval support review workflows
- Roll-forward, branded exports, and a client PBC portal streamline engagement files
Where it doesn't
- No free plan; paid plans start at $349 per month
- PBC access centers on existing requests rather than full binder collaboration
- SOC 2 and SAML SSO are roadmap items rather than current features
- AttestWork8.5/10 · From $115/mo · 5-day trial
Affordable audit automation with workpapers, client collaboration, and AI-assisted workflows.
Visit AttestWorkFull verdict → - GAASFlow7.2/10 · 7-day trial
Structured web workpapers, review controls, and client requests for growing CPA firms.
Visit GAASFlowFull verdict →
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All external audit software comparisons → · Full ranking →
Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
Last updated · How we research and update







