The 519 Most Popular SaaS Startups from London (2026)

London is home to 519 SaaS and AI products actively bought by companies on Cledara, led by ElevenLabs (0.20% market share). This ranking is built from real purchasing data — what companies actually pay for, not funding announcements — and updates monthly. Data as of 27 July 2026, 19:31 UTC.

Top SaaS companies from London

#ProductCategoryFoundedEmployeesFunding12-mo rank
1ElevenLabsMarketing & Growth2,02251-200 employees$250M++26
2CharlieHRPeople Ops & Talent2,01511-50 employees-13
3GranolaCollaboration & Productivity2,02311-50 employees$50M - $100M+637
4VestdPeople Ops & Talent2,01451-200 employees-29
5HumaansPeople Ops & Talent2,01951-200 employees$10M - $25M-70
6JiminnySales & Revenue2,01651-200 employees$10M - $25M-242
7WorkablePeople Ops & Talent2,008501-1,000 employees$25M - $50M-249
8PerkboxPeople Ops & Talent2,01551-200 employees$10M - $25M+414
9ZincPeople Ops & Talent2,01751-200 employees$5M - $10M-90
10LedgyPeople Ops & Talent2,01751-200 employees$10M - $25M-233
11SpillPeople Ops & Talent2,01711-50 employees$1M - $5M-42
12Fyxer AICollaboration & Productivity2,02351-200 employees$25M - $50M+265
13IntruderIT & Security2,01551-200 employeesUnder $1M-60
14ApprovalMaxFinance & Accounting2,01651-200 employees$10M - $25M-6
15CordPeople Ops & Talent2,01611-50 employees-157
16AttioSales & Revenue2,01951-200 employees$100M - $250M+473
17CognismSales & Revenue2,015501-1,000 employees$50M - $100M-339
18OfficelyPeople Ops & Talent2,02111-50 employees$1M - $5M-24
19StotlesOperations & Supply Chain2,01951-200 employees$10M - $25M-11
20DextFinance & Accounting2,010201-500 employees$50M - $100M+5
21SeedLegalsLegal, Risk & Compliance2,01651-200 employees$1M - $5M-100
22PlummPeople Ops & Talent2,02011-50 employees$1M - $5M+296
23JunoPeople Ops & Talent2,01911-50 employees-130
24OnfidoIT & Security2,012501-1,000 employees$100M - $250M
25Ideal PostcodesEngineering & DevOps2,0122-10 employees+357
26ScaleXPFinance & Accounting2,02111-50 employeesUnder $1M-68
27ChaserFinance & Accounting2,01311-50 employees$1M - $5M-97
28NexudusOperations & Supply Chain2,01251-200 employees-116
29PaddleFinance & Accounting2,012201-500 employees$100M - $250M-32
30GeckoboardData & Analytics2,01011-50 employees$1M - $5M-158
31trumpetSales & Revenue2,02111-50 employees$5M - $10M+109
32AblyEngineering & DevOps2,01651-200 employees$50M - $100M-17
33SynthesiaMarketing & Growth2,017501-1,000 employees$250M++4
34CausalFinance & Accounting2,01911-50 employees$10M - $25M-102
35EmbeddableData & Analytics2,02311-50 employees$5M - $10M+945
36MetaviewPeople Ops & Talent2,01811-50 employees+309
37VEED.IOMarketing & Growth2,01851-200 employees$25M - $50M-13
38CyberSmartIT & Security2,01651-200 employees$10M - $25M-377
39GameAnalyticsData & Analytics2,01111-50 employees
40Terra APIEngineering & DevOps2,02111-50 employees$1M - $5M+1,160
41GrowthLeadSales & Revenue2,02111-50 employees
42ZiflowCollaboration & Productivity2,01651-200 employees+112
43SembleOperations & Supply Chain2,01951-200 employees$10M - $25M-275
44MaydayFinance & Accounting2,02111-50 employees$1M - $5M+490
45Distribution Engine by NC SquaredSales & Revenue2,01111-50 employees
46PrivaseeLegal, Risk & Compliance2,0252-10 employees-506
47ZapparMarketing & Growth2,01151-200 employees$1M - $5M
48CodemagicEngineering & DevOps2,01711-50 employees+40
49Red SiftIT & Security1,001-5,000 employees-143
50EnsembleFinance & Accounting2,0212-10 employees

Showing the top 50 of 519 companies. The interactive page loads the full ranking, and the complete list is available as <a href="/api/export/startups/united-kingdom/london.csv">CSV</a> or <a href="/api/export/startups/united-kingdom/london.json">JSON</a>.

London startups by size and funding

The largest SaaS company from London by headcount is Marks & Spencer (10,001+ employees).

193 of 519 have disclosed funding, topped by ElevenLabs ($250M+).

The newest entrant is Privasee (founded 2025).

The oldest is Fortnum & Mason (founded 1707); the newest, Privasee (2025).

What London startups build

CategoryProducts
Marketing & Growth96
People Ops & Talent63
Finance & Accounting49
Operations & Supply Chain48
Engineering & DevOps48
Collaboration & Productivity43
Sales & Revenue33
Legal, Risk & Compliance30
Data & Analytics27
IT & Security24
Other24
Customer Success & Support22
AI Platforms & Model Ops12

London's SaaS scene skews toward Marketing & Growth — 96 of its 519 tracked companies build marketing & growth software.

London vs the United Kingdom

London accounts for 60% of the 867 ranked SaaS products founded in the United Kingdom.

Frequently asked questions

What are the biggest SaaS startups in London?

ElevenLabs, CharlieHR and Granola are the most-used SaaS products founded in London, based on real purchasing data from companies on Cledara. Last updated 27 July 2026, 19:31 UTC.

How many SaaS companies are based in London?

519 SaaS and AI products founded in London are actively bought by companies tracked on Cledara. Aggregators list more registered startups; this ranking counts only products with real, current usage.

Which London startups are growing fastest?

Requesty and CoinAPI show the strongest rank gains among London-founded products over the last 90 days.

How is this different from other London startup lists?

Most lists rank London startups by funding raised or valuation. This one ranks them by adoption — how many companies actually pay for each product — measured monthly from Cledara's purchasing data.