United Kingdom · 
Who invested in Shackle?
Shackle's investors include Frontline Ventures and Stripe.
202120222023
$409KRound$5.0MSeed$15MSeries A
United Kingdom · Series A startup
Who invested in Shackle
Funding summaryUpdated 26 Oct 2026
$20Mraised across 3 rounds since 2020, from 3 sources
$409KRound$5.0MSeed$15MSeries A
- Latest round
- Series A, $15MSept 2023
- Step-upi
- 2.9×
- Investors
- 2
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Round, $409K Dec 2020
- Biggest round
- $15M Series A · Sept 2023
- Usual gap between rounds
- 2.3 years the median of 2
The rounds
- Sept 2023
- Jun 2021Seed$5.0M
No investor was named in the report.
Shares issued, filed with Companies House (SH01); no report of this raise yet
- Dec 2020Round$409K
No investor was named in the report.
Shares issued, filed with Companies House (SH01); no report of this raise yet
Funding filed with regulators
Shackle filed 3 raises, $15M in all. Filings say how much was sold and to how many investors; they never name the investors.
- Oct 2023$12MUK share allotment
- Jun 2021$2.5MUK share allotment
- Dec 2020$205KUK share allotment
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Shackle
How much has Shackle raised?
Shackle has raised $20M across 3 rounds since 2020.
When did Shackle last raise?
Shackle's most recent round was a Series A of $15M in Sept 2023.
What was Shackle's biggest round?
Its most recent round, $15M in Sept 2023, is also its largest on record.
Who backed Shackle first?
Shackle's first round on record, in Sept 2023, was backed by Frontline Ventures and Stripe.
What stage is Shackle at?
Shackle's latest named round is a Series A, in Sept 2023.
Where is Shackle based?
Shackle is based in the United Kingdom.
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