Sirenum
United Kingdom
Valuation · 2015
$4.6M
2021 Revenue
$5M
Funding
$4.2M
Team
55
Founded
2013
Sirenum Revenue, Valuation & Funding (2021)
Sirenum generated $5M in revenue in 2021.
Sirenum is a WFM platform for employers to put the right shift worker in the right place at the right time and pay the right amount.
Last updated
Sirenum Revenue
In 2021, Sirenum's revenue reached $5M.
| Year | Milestone | Source |
|---|---|---|
| 2021 | Sirenum Hit $5m revenue in January 2021 | Not recorded |
| 2013 | Launched with $0 revenue |
Sirenum Valuation, Funding Rounds
Sirenum reached a $4.6M valuation in 2015, set during its Angel round.
Sirenum has raised $4.2M in total funding across 4 rounds, most recently a $2.7M Series A round in 2021.
| Year | Round | Amount | Valuation | % Sold | Source |
|---|---|---|---|---|---|
| 2021 | Series A | $2.7M | - | - | Not recorded |
| 2019 | Seed | $1.4M | - | - | Not recorded |
| 2016 | Seed | $50K | - | - | Not recorded |
| 2015 | Angel | $55.9K | $4.6M | 1% | Not recorded |
Founder / CEO
Benjamin Rubin
CEO
Benjamin Rubin founded Sirenum in 2013 based on a decade of staff management experience. Benjamin was previously the head of the political wing of Green Course, the largest environmental volunteer organization in Israel. Previous to this, he was one of the founding members and leaders of Media Central, a PR agency also based in Israel. Benjamin is a trained molecular biologist with a master’s degree from Hebrew University and a bachelor’s degree from Ben Gurion University. Benjamin was born and raised in Israel, but now resides in North London with his wife and four children. A native Hebrew speaker, Benjamin also speaks French and Spanish, plus a touch of Arabic.
Customers
We do not have customer count information for Sirenum yet.
Sirenum Employees & Team Size
Sirenum employs approximately 55 people as of 2026.
| Year | Milestone | Source |
|---|---|---|
| 2021 | Reached 55 employees (January 2021) | Not recorded |
Frequently Asked Questions about Sirenum
Is Sirenum still an independent company?
No. Sirenum was acquired by Bullhorn.
What is Sirenum's revenue?
As of 2021, Sirenum generated $5M in revenue.
Who founded Sirenum?
Sirenum was founded by Benjamin Rubin.
How much funding does Sirenum have?
Sirenum raised $4.2M across 4 rounds.
How many employees does Sirenum have?
As of 2021, Sirenum had 55 employees.
Where is Sirenum headquartered?
Sirenum is headquartered in United Kingdom.
Compare Sirenum to the industry
Sirenum operates across multiple industries. Browse revenue, funding, and growth data for Sirenum in each sector below.
Data and Sources
All figures on this page are taken directly from interviews or are estimates from public sources and proprietary models. Not financial advice. Read full disclaimer.
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