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Head-to-head · External Audit Software

AttestWork vs GAASFlow

  • Updated Sep 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score AttestWork #3 in External Audit Software 8.5/10 From $115/mo · 5-day trial ✓ 5 of 5 features Visit AttestWork
GAASFlow #5 in External Audit Software 7.2/10 7-day trial ✓ 5 of 5 features Visit 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

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

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
  • 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
  • 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
Cons
  • 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
  • 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
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 →
  1. AttestWorkExternal Audit Software 8.5From $115/mo · 5-day trial
  2. GAASFlowExternal Audit Software 7.27-day trial

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 →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update