Siren Reviews

4.4

89% would recommend to a friend

(15 total reviews)

John Randles

88% approve of CEO

88% positive business outlook

Siren has an employee rating of 4.4 out of 5 stars, based on 15 company reviews on Glassdoor which indicates that most employees have an excellent working experience there. The Siren employee rating is in line with the average (within 1 standard deviation) for employers within the Information Technology industry (3.9 stars).

Reviews by job title

15 reviews
5.0
10 June 2026
Recommend
CEO approval
Business outlook

Pros

One of the finest company cultures I have experienced, where people genuinely want each other to succeed. The company has an entrepreneurial mindset, and everyone works together toward building the best possible product. The work can be complex, but teammates are always willing to help and share knowledge. Management is highly supportive. My manager has been more of a mentor, gradually helping me take on more responsibility and grow professionally. I could not have asked for more, and I will always be grateful for the guidance and support I received. Leadership is highly approachable and accessible. Renaud Delbru, Co-Founder and Chief Scientific Officer, is always open to conversations and happy to help when needed. The company also invests in team bonding through regular offsites, which help strengthen relationships across the organization. I feel fortunate to have been part of this team and to have had the opportunity to work in such a collaborative environment. I genuinely wish the company continued success and growth, as it is well-deserving given the hard work and dedication of the team.

Cons

As the company continues to grow, there are opportunities to further enhance the compensation and benefits package.

5.0
11 Feb 2026
Recommend
CEO approval
Business outlook

Pros

No two days are the same High growth Incredibly interesting industry Transparent management Great location Culture like no other Dog friendly office Lots of opportunity to travel. Super intelligent colleagues who are very friendly and approachable

Cons

Distributed workforce so I can't see everyone as often as I'd like. Can take a little bit of time to understand the full capabilities of the product.

Viewing 1 - 3 of 15 Reviews

Glassdoor has 15 Siren reviews submitted anonymously by Siren employees. Read employee reviews and ratings on Glassdoor to decide if Siren is right for you.