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Deloitte versus Technology & Services Industry Association | TSIA
Compare	Deloitte	Technology & Services Industry Association \| TSIA
Verdict	Depends	Depends
Best for	Global enterprises needing audit and tax	Enterprise tech firms with services revenue
Who it's not for	Small businesses needing basic tax or bookkeeping	Startups and small businesses . priced and built for enterprises
Privacy	Multiple public incidents: 2017 client-email breach, 2025 Rhode data-breach payout, 2026 CVE disclosed.^⁵	No known public vulnerabilities found in the sources reviewed.
Support quality	No client-support evidence found	Dedicated member success managers listed on LinkedIn.
Public sentiment	Client-facing products score 4.2/5 on G2, but 25,000+ employees rate the firm just 3.6/5.^¹	Direct user reviews are scarce; TSIA Intelligence holds 5.0/5 from 24 Microsoft Marketplace ratings while employee reviews average 2.8/5 on RepVue.¹⁶
Biggest gotcha	2017 hack revealed clients' confidential emails^⁵	Guess: enterprise membership costs undisclosed; expect a sales negotiation before knowing the price.

Pick Deloitte when

Global enterprises needing audit and tax
Regulated industries (banking, government)
Large transformations and cyber incident response

When Deloitte is not a fit

Small businesses needing basic tax or bookkeeping
Buyers wanting published pricing or self-serve
Teams needing quick, fixed-scope projects
Anyone without six-figure-plus engagement budgets

Pick Technology & Services Industry Association | TSIA when

Enterprise tech firms with services revenue
Customer success and support leaders
Teams needing industry benchmarks
Companies adopting subscription/LAER models

When Technology & Services Industry Association | TSIA is not a fit

Startups and small businesses . priced and built for enterprises
Buyers wanting software; TSIA sells research, not tools
Companies with no services, support, or success arm
Anyone needing published pricing before a sales call

Sources

Deloitte Products on G2g2.com
review
Deloitte Reviews . AmbitionBoxambitionbox.com
review
Trustpilot reviews of deloitte.comtrustpilot.com
review
r/deloitte employee discussionsreddit.com
review
Guardian: Deloitte hit by cyber-attack revealing clients' emailstheguardian.com
security
Deloitte pays $5M over Rhode breachcybersecuritydive.com
security
CVE-2026-57476 Detail . NVDnvd.nist.gov
security
Deloitte Agrees to $21.5M settlement . DOJjustice.gov
news
Deloitte security services rankdeloitte.com
official
DART pricing pagedart.deloitte.com
official
Deloitte clients listbig4accountingfirms.com
news
Preferred-vendor MSA switching paincodingscape.com
news
Mid-market managed SIEM alternativesunderdefense.com
news
Deloitte AI debacle . CFO Divecfodive.com
news
TSIA Review 2026: Pricing, Features, Pros & Conssaleshive.com
review
TSIA Intelligence | Microsoft Marketplacemarketplace.microsoft.com
review