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No. 03 · The observatory

Adaptive

Overlay on construction accounting. Vendor-reported growth with unanswered revenue questions.

Status
Open
Case
One of eight recorded cases
The observatory in the gingerbread village
Snapshot
Scored 2026-10-05, reported 2026-10-09
Milestones
7 recorded, 1 with an exact day
Limits
Partial and unavailable dates stay as recorded text. The timeline plots exact days only.

Adaptive

Adaptive sells AI agents that run construction back-office work beside the existing ledger. Agents read bills, code them, chase lien waivers and push human-approved entries. It reports 750-plus builders and 40-plus accounting firms as of September 2026. It replaces clerical work and point tools, not the ledger itself.

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The market it attacks

Small builders keep books in QuickBooks, with project finance in email and Excel. Larger contractors run construction ERPs with deep roots. Sage 300 CRE began as Timberline in 1971; Foundation has sold since 1985. Trimble paid $1.2B for Viewpoint in 2018: 8,000 customers, 46% of the ENR 400. Controllers, AP clerks, office managers and outside bookkeepers run these systems. They stick for five reasons: surety reporting duty, failed replacements, tolerated tech debt. The other two are people acting as middleware and scarce replacement skills. Kier’s Oracle ERP grew from a £30M budget to £90M; Balfour Beatty wrote down £21M. Sage 300 CRE still runs on Pervasive/Actian, with no announced end of life. Fifty-one percent still use spreadsheets, 49% move data by hand, 5% report integration. Over 300,000 accountants left the US profession between 2019 and 2022. Staff who know the current system are hard to replace and slow to retrain. No public source shows long contracts; reports, data and skills hold customers.

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Origin and the first wedge

Three founders with no construction background started in summer 2021. A zoning tool for Austin builders exposed the accounting pain instead. Cost calls showed owners missing project profit, double payments and unbilled changes. They ran a paid bookkeeping firm from an Airbnb for local builders, learning QuickBooks. A $750K pre-seed closed in August 2021. OCR and machine learning made invoice reading viable by 2022. Generative models by 2024 made the wider back office reachable. Intuit’s mid-market suite arrived only in September 2024, leaving room above QuickBooks.

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The first customers

The first job was accounts payable end to end, for small GCs without accounting staff. Bills arrived by forward, text or scan; automatic requests chased subs for details. No outside portal was required for vendors or field staff. The February 2022 site also pitched budgets, corporate cards and timesheets. Bill pay carried zero transaction fees by December 2022. Riverside Homes quoted the first homepage; Mark D. Williams was an alpha client. About ten beta users converted to paying before the February 2023 Builders’ Show launch. Founder-led sales ran through early access and builder podcasts. Reece Barnes, a builder-facing consultant, joined to lead sales in January 2023. Onboarding imported QuickBooks history in about 30 minutes at first. Barnes later put setup at two to three hours over 15 days; selling ran longer. March 2024 pricing started at $300 a month for builders under $3M, monthly terms.

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How big it is now

A $6.5M seed closed April 2022, led by Andreessen Horowitz. A $19M Series A followed July 15, 2024, led by Emergence, for $26.4M total. The $30M Series B of September 17, 2026, led by Tidemark, totals $57M. Customers went from about ten in 2023 to 280-plus and $1.4B volume in July 2024. About 320 customers spanned 25-plus states by September 2024. The count passed 500 in April 2025 and 600-plus that October. A claimed 1,000 in February 2026 became 750-plus companies that September. The reported base is 750-plus builders, $5M to $1B revenue, on ten-plus ledgers. October 2026 cites 65 staff, 7K-plus contractors, 10K projects, $10B volume and NPS 80. Revenue stays undisclosed; a sponsored newsletter claims most new ARR comes upmarket. Adams-Bickel, a $40M GC, cut bill processing from about 1.5 weeks to one day. Bean Co Homes reports 30 staff hours saved weekly; Croxall skipped a third bookkeeper. Partner firms include CLA, Pinion and Blackline; HBFP manages $700M of projects.

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What made it hard

Founders bought credibility by keeping builders’ books themselves. Builders showed software fatigue; invoices and partners change per job and state. List prices stepped $300, $575 then $599 a month, with no transaction fees. At $599 entry, 750 customers reference about $5.4M ARR, not an estimate. Larger firms pay custom rates, and 2026 pricing moved to revenue bands and agent counts. Setup grew from 30 minutes to engineer-configured agents live in 30 to 90 days. QuickBooks Desktop syncs most records both ways, on a schedule. Sage Intacct takes one-way manual pushes; Foundation, Vista and Spectrum need CSV files. Capterra’s 63 reviews average 5.0, yet cite misread invoices and sync bugs. Agave investor Accel reports two-way links into 14-plus ERP and project-management systems. Field Materials posts into nine accounting systems. Incumbents answered: Intuit built a construction agent, Foundation reads invoices, Procore moves pay. Cards run through bank partners; every ledger action needs human approval. Sureties treat the WIP schedule as the bonding file core and prefer GAAP. A new ledger would put that bonding file at risk.

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The strategy

Adaptive is an overlay with AI-service traits; it owns no ledger and found no acquisitions. Step one was AP on QuickBooks; step two added budgets, draws, waivers and purchase orders. Its own charge card launched May 2025, a product pitched back in 2022. An accounting-firm channel claims six of the top 100 firms live. Adaptive claims a partner firm can serve three to five times more clients per staffer. A Procore link in October 2025 opened the upmarket climb to Intacct and Acumatica. The pitch moved from fintech one-stop shop to an agent layer leaving ledgers in place. June 2026 agents cover WIP, forecasting, field coordination, AP, change orders and billings. Agents reach superintendents by call or text for job facts, never a portal. Payroll, once promised, is absent from the 2026 agent pitch. Briq’s data-cloud plan died on missing APIs; its RPA pivot sold to CFOs. Briq’s founder reports 300 then 100 staff; TechCrunch counted 138 in late 2023. Flashtract needed two-sided adoption and sold to Trimble in May 2024 for undisclosed terms. Adaptive’s one-sided adoption across ten-plus ledgers is the designed contrast.

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Milestones

  • January 2023: About ten paying customers before public launch.
  • February 2023: Public launch at the International Builders’ Show.
  • July 2024: 280-plus companies and $1.4B project volume.
  • April 2025: 500-plus customers.
  • September 17, 2026: Series B, $30 million led by Tidemark.
  • September 2026: 750-plus companies, 40-plus accounting firms.
  • October 2026: 10,000-plus active projects, $10B annualized volume.

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What others can copy

Do the job by hand first: test payment for manual delivery inside 60 days. Enter below the ERP floor: keep entry price under 10% of the hire it removes. Make adoption one-sided: count the steps that finish with zero new external accounts. Cap ledger concentration: test whether any single GL nears half of ARR. Flashtract’s best customers already ran the ERP of the vendor that bought it. Recruit the accountants: compare retention on partner-sourced and direct accounts. Gate the ledger with a human: track approval-without-edit rates and revenue per employee. These are founder tests to run, not results already achieved.

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Open questions

Revenue, gross margin and retention are undisclosed. The 1,000-versus-750 customer gap could mean churn, pruning or redefinition. A 2026 conference bio still cites 1,000 businesses and $26M raised, likely written earlier. CSV links may struggle to hold mid-market accounts against native two-way rivals. Engineer-configured delivery could erode software margins as count grows. Incumbents could absorb the wedge from inside the ledger. Ledger ownership and fee-free payment monetization stay unanswered.

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Limits

Most scale figures are vendor-reported and unaudited. The only published growth rates come from a sponsored newsletter. The Briq headcount and founding-year figures carry source disagreements. The $5.4M ARR figure is a reference point, not a revenue estimate.

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Exhibit 8Explore · open a case

Milestones in the Adaptive case

Exact-day events on a UTC timeline, one lane per case.

  • milestone

How to readEach dot is a dated milestone. Only exact dates draw dots.

NoteMonth- and year-only milestones stay in the tables, never plotted.

SourceLegacy Software Atlas. Frozen scoring snapshot of 5 October 2026. Report version 4 dated 9 October 2026.

Recorded milestones

Every recorded event for this case, in frozen order. Statuses stay as recorded.

MilestoneDateStatusSources
About ten paying customers before public launchJanuary 2023reportedThe Curious Builder podcast, Episode 80 with Matt Calvano and Reece Barnes (transcript), Sep 22, 2024.
Public launch at the International Builders’ ShowFebruary 2023reportedAdaptive blog (Matt Calvano), Series A post, Jul 15, 2024.
280-plus companies and $1.4B project volumeJuly 2024reportedPR Newswire (Adaptive release), Series A announcement, Jul 15, 2024.
500-plus customersApril 2025reportedAdaptive blog (Matt Calvano), 500 customers, Apr 22, 2025.
Series B, $30 million led by TidemarkSeptember 17, 2026reportedPR Newswire (Adaptive release), Series B announcement, Sep 17, 2026.
750-plus companies, 40-plus accounting firmsSeptember 2026reportedPR Newswire (Adaptive release), Series B announcement, Sep 17, 2026.
10,000-plus active projects, $10B annualized volumeOctober 2026reportedAdaptive careers page, accessed Oct 5, 2026.

Back to the cases chapter and the full milestone table.