WillItSurvive
Payments companies · United Kingdom

Thought Machine

Builds Vault Core, a cloud-native core banking ledger used by banks to run accounts.

Defensible for now
Assessed 21 July 2026 · Evidence as of 21 July 2026
Real protection, with named pressure against it.
On the recordSince 21 July 2026 · Checkable from ~Oct 2027 · Every call on the record Checkpoint: FY2026 audited results release, testing if growth and loss-narrowing hold
The call

Thought Machine has one profitable-ish year and 18 Tier-1 banks live on Vault, with the real fight against Mambu, 10x, and Tuum rather than AI or old-guard vendors.

Thought Machine built Vault Core, a cloud-based system that handles the core transactions for banks, 68 of them so far, including 18 of the biggest ones. It is hard to replace because banks cannot easily switch their transaction ledger once it is running their daily business, and it takes years to move to something else. However, Thought Machine faces rivals like 10x Banking and Mambu that offer similar modern software, and the company has only shown one year of narrowing losses after ten years of spending more than it made, so it is not yet proven it can sustain profit growth. The main question is whether Thought Machine can keep its biggest bank customers from switching to a competitor and whether its sales growth can keep accelerating.

Why
01
AI pressure: None apparent. AI mainly speeds bank migrations and rival development, it does not yet replace the ledger banks trust for compliance. Could AI do the core job? Unlikely.
02
Bigger players: Fiserv, Temenos, or Oracle, if one buys a cloud-native rival like 10x Banking or Tuum. Legacy vendors can't easily rebuild cloud-native cores, but buying a young rival would hand them a fast route to compete for new Tier-1 deals. Could a giant copy it? Probably.
03
What protects it. 68 signed banks including 18 Tier-1 institutions already running live ledgers on Vault, which are costly and risky to rip out.
What would change this call
A named Tier-1 bank publicly replaces Vault Core with 10x Banking, Mambu, or Tuum. Would show the switching-cost moat fails under live competitive pressure.
FY2026 audited revenue growth rate versus the 57% YoY posted in FY2025. Would show whether growth is compounding or reverting toward flat.
Fiserv, Temenos, or Oracle acquires 10x Banking, Tuum, or Pismo. Would show incumbents backing a cloud-native rival to contest Tier-1 wins.
Key numbers
  • FY2025 revenue £74.8m, up 57% YoY (2025-12-31)
  • Losses narrowed to ~£12m from ~£69.3m (2025-12-31)
  • Passed $100m total revenue milestone (2026-06-30)
Named risks
  • Only one profitable-trending audited period (FY2025) after a decade of losses; FY2026 results could reverse the trend. Severity: high
  • IPO delayed to 2028 at earliest amid difficult listing climate, extending dependence on private funding rounds. Severity: medium
  • Headcount and hiring have swung sharply (683 peak, cut to 518, now hiring 100+ engineers), signaling volatility in cost discipline. Severity: medium
  • Well-funded cloud-native peers (10x Banking, Mambu, Tuum) share the same architectural advantage and compete for the same limited pool of Tier-1 migrations. Severity: medium
  • Most recent disclosed valuation ($2.7bn) is from 2022, over three years old, obscuring current market value. Severity: low
Rivals, as read in July 2026
RivalDirectionEvidence
10x BankingcontestingFunded cloud-native rival with Chase UK and Westpac as clients, competes for new Tier-1 logos as of 2026
Mambugaining onMambu's PeerSpot mindshare fell sharply from 19.4% to 9.4% YoY as of July 2026, Thought Machine claims more Tier-1 contracts than all next-gen rivals combined
Temenosgaining onTemenos mindshare declined from 14.0% to 12.4% YoY per PeerSpot, July 2026, while Thought Machine grew 57% YoY
Fiserv (via Finxact)contestingIncumbent Fiserv owns Finxact, giving it a cloud-native entry point to compete for the same Tier-1 migration deals
TuumcontestingTallinn-based cloud-native core banking peer competing in the same next-gen category as of 2026
Questions people ask
Is Thought Machine profitable in 2026?
Not fully audited yet, but trending that way. FY2025 losses narrowed to roughly £12m from about £69.3m in FY2024, and the company says it achieved positive free cash flow in H2 2025, on revenue of £74.8m, as reported July 2026.
Who are Thought Machine's biggest competitors?
Its closest rivals are cloud-native core banking peers Mambu, 10x Banking, Tuum, Finxact (Fiserv-owned), and Pismo, while legacy giants Temenos, Oracle FLEXCUBE, Infosys Finacle, FIS, and Fiserv remain structurally slower incumbents in the same space, as of 2026.
Could AI replace Thought Machine's core banking product?
Unlikely soon. Vault Core is a regulated, systemic-risk ledger with 18 Tier-1 banks embedded in multi-year contracts, and Thought Machine itself frames AI only as an accelerant for migrations and operations automation, not a replacement for the core ledger, per its July 2026 announcement.
Is joining Thought Machine risky right now?
Mixed signals. The company cut about 8% of staff (roughly 50 roles) in October 2023, but by mid 2026 it was hiring 100+ engineers and opening a new Lisbon office after crossing $100m in ARR, suggesting renewed expansion after a leaner 2023 to 2024 period.
Who owns Thought Machine?
Thought Machine is privately held and venture-backed, with no parent company. Major investors across funding rounds include Lloyds Banking Group, Molten Ventures, Eurazeo, Nyca Partners, JPMorgan Chase, Temasek, Intesa Sanpaolo, and Morgan Stanley, with its most recent disclosed valuation at $2.7bn from a 2022 Series D.
When is Thought Machine's IPO?
CEO Paul Taylor pushed back any London IPO to 2028 at the earliest, citing a difficult current listing climate, according to reporting from July 6, 2026, even as the company touted crossing $100m in revenue and ARR.
Timeline
  • 2026-07-07Thought Machine discloses quiet Series E of £51m (July 2025) and new £30m ($41m) raise from a Tier-1 bank investor
  • 2026-07-06Reports say Thought Machine hits $100M revenue and ARR, delays IPO to 2028 at earliest
  • 2026-07-05Thought Machine press release announces passing $100m total revenue threshold, plans 100+ new engineers, Lisbon office
  • 2026-07-01PeerSpot data shows Temenos mindshare down to 12.4% and Mambu down to 9.4% year over year
  • 2025-12-31FY2025 audited revenue reported at £74.8m, losses narrowed to about £12m, positive free cash flow in H2
  • 2025-10-02Tech.eu reports Thought Machine raised £45m as FY2024 losses increased to £69.3m
  • 2023-11-01Thought Machine cuts about 50 staff (8% of workforce), reducing headcount to roughly 590
  • 2022-01-01Series D raises $160m led by Temasek, valuation reaches $2.7bn
  • 2021-01-01Series C raises $200m led by Nyca Partners and JPMorgan Chase, valuation passes $1bn
  • 2014-01-01Thought Machine founded in London by CEO Paul Taylor
Revision history
21 July 2026
First assessed. Defensible for now. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources