Which firms provide outsourced controller services?
The Firms AI Names for Outsourced Controller and Bookkeeping Work
3 firms lead, appearing in 24.0–40.0% of 25 AI responses. The sample cannot separate them, so we do not pretend it can.
Based on 25 ChatGPT responses to this question, collected August 8, 2026. Firms are counted once per response. How we measure.
Key findings
- BPM, AccountingDepartment.com and Etisson lead this sample, each named in 24.0–40.0% of 25 ChatGPT responses to the question “Which firms provide outsourced controller services?”, collected August 8, 2026.
- The gaps between BPM, AccountingDepartment.com and Etisson are inside the margin of error at 25 responses, so The Shortlist Report groups them in one tier rather than ranking them against each other.
- 10 firms cleared the reporting threshold on “Which firms provide outsourced controller services?” in ChatGPT as of August 8, 2026; the full table with response counts is below.
- BPM appears in 2 of the 8 fractional CFO and outsourced accounting firms reports published by The Shortlist Report, the widest coverage of any firm named on this page.
- No firm paid to appear in this ranking; placement cannot be bought, and the counts come from ChatGPT responses rather than from submissions.
The ranking
| Firm | Responses | Share | |
|---|---|---|---|
| Tier 1 3 firms, 24.0–40.0% | |||
| BPMProvides fractional and interim controller services and broader outsourced accounting for mid-market companies with complex needs. | 10 of 25 | 40.0% | |
| AccountingDepartment.comProvides outsourced accounting, bookkeeping, controller support, and tax coordination for growth-stage companies roughly $2M–$50M revenue. | 7 of 25 | 28.0% | |
| Etissonetisson.comProvides outsourced controller services including month-end close, financial reporting, reconciliations, and budgeting, primarily for CPA firms. | 6 of 25 | 24.0% | |
| Tier 2 7 firms, 12.0–16.0% | |||
| Adams BrownDelivers outsourced controllership and month-end close services through a CPA firm to SMBs and middle market. | 4 of 25 | 16.0% | |
| Resourcifiresourcifi.comProvides dedicated accounting specialists and AP/AR management for small to mid-market businesses across QuickBooks, NetSuite, and Xero. | 4 of 25 | 16.0% | |
| Tristan CPAtristancpa.comOutsourced accounting, bookkeeping, and fractional Controller/CFO services for $1M–$10M businesses. | 4 of 25 | 16.0% | |
| Accountablyaccountably.comDelivers outsourced bookkeeping, reconciliations, month-end close, and reporting to SMBs and accounting firms. | 3 of 25 | 12.0% | |
| BooksClosebooksclose.comProvides fractional controller and month-end close services for businesses needing strong financial reporting. | 3 of 25 | 12.0% | |
| DMG CPAsdmgcpas.comProvides month-end close, reconciliations, and financial reporting for growing businesses; also offers outsourced controller services to CPA firms. | 3 of 25 | 12.0% | |
| Global Accounts PartnerManages end-to-end accounts payable and accounts receivable, including collections, for companies seeking AP/AR outsourcing. | 3 of 25 | 12.0% | |
Why the tiers fall where they do
Tier 1 holds BPM, AccountingDepartment.com and Etisson, named in 6 to 10 of the 25 ChatGPT responses. They are grouped rather than ranked because the gaps between them are inside the margin of error at this sample size — one extra mention would reorder them, so an order would be reporting noise as a finding.
Tier 2 holds Adams Brown, Resourcifi, Tristan CPA, Accountably, BooksClose, DMG CPAs and Global Accounts Partner, named in 3 to 4 of 25 responses (12.0–16.0%). The sample does separate these firms from the tier above: the difference from the leading group is larger than the margin of error, which is what puts them in a tier of their own.
The test is McNemar’s at 95%, applied against the same 25 responses for every firm. The full reasoning, and what happened when we ranked one-to-N instead.
What the sample shows
3 firms lead this question: BPM, AccountingDepartment.com and Etisson. They appear in 24.0–40.0% of the 25 responses. The gaps between them are inside the margin of error at this sample size, so they are listed together rather than ranked against each other.
124 firms were named at least once across the sample. 10 of them cleared the threshold of 2 responses and appear above; the rest were named once and are inside the noise.
How to read this
Firms are grouped into tiers, not ranked one to fifteen. A tier holds every firm whose 95% confidence interval overlaps the leader's, which is a long way of saying the sample cannot tell them apart. Order within a tier is arbitrary — read the counts, not the position.
Share is the percentage of responses that named the firm — not a quality score. A firm scoring low here may be excellent and simply under-written about online, which is a finding about its visibility rather than its work.
The same question was asked repeatedly because AI assistants do not answer identically twice. A single response would tell you almost nothing.
What this measurement does not tell you
- It is not a quality ranking. Share reflects how much has been written about a firm online, which is what an AI assistant reads. A capable firm nobody writes about scores low here.
- It is a reading from a date range, not a permanent standing. This sample was collected August 8, 2026; models change and so do their answers.
- It covers ChatGPT only. Other assistants answer differently, and we do not extrapolate across engines we have not measured.
- Order within a tier is arbitrary. Read the counts, not the position. Why we use tiers.
Cite this report
Danielle Trettson. (2026). The Firms AI Names for Outsourced Controller and Bookkeeping Work. The Shortlist Report. https://www.shortlistreport.com/article/outsourced-controller-bookkeeping
Underlying counts: CSV · JSON · reusable under CC BY 4.0 with attribution.