Product Reports Resources Pricing Login Book a demo

SiSaf

Biotech & Life Sciences · Guildford, United Kingdom · Founded 2008

Advancing RNA Therapeutics MoreLess

SiSaf is a biopharmaceutical company founded in 2006 by Dr. Suzanne Saffie-Siebert, a nanoparticle scientist with over 25 years of experience in the pharmaceutical industry.

Dr. Saffie-Siebert's journey as an entrepreneur is deeply connected to her scientific expertise. She is the inventor of the company's proprietary Bio-Courier technology, a drug delivery platform based on silicon-stabilized liposomes. This technology is designed to overcome the challenges of delivering RNA-based therapies to specific cells in the body.

SiSaf's business model is focused on the development of RNA therapeutics for rare genetic disorders. The company leverages its Bio-Courier platform to create a pipeline of treatments for these diseases. SiSaf operates in the biopharmaceutical market, collaborating with other companies and research institutions to advance its therapeutic programs. The company generates revenue through a combination of research and development collaborations, licensing agreements, and the future commercialization of its products.

The company's core product is its Bio-Courier technology. This platform utilizes silicon-stabilized liposomes to encapsulate and protect RNA molecules, ensuring their safe and effective delivery to target cells. The benefits of this technology include improved stability, reduced toxicity, and enhanced therapeutic efficacy of RNA-based drugs. A key selling point of the Bio-Courier platform is its potential to enable the development of treatments for a wide range of rare genetic diseases that are currently untreatable.

Keywords: biopharmaceutical, drug delivery, RNA therapeutics, rare genetic disorders, silicon-based, liposomes, gene therapy, nanomedicine, drug development, clinical trials

Company overview

SiSaf company information

The essential company record, classifications and operating signals in one place.

Status
Operational
Founded
2008
Headquarters
Guildford, United Kingdom
Employees
17
Open positions
None listed
Dealroom signal
67.3
client focusb2btechnologyNanotechsub industryPharmaceuticalsub industryBioTechnologybusiness modelManufacturingindustryHealthsectorBiotechnologysectorDrug DevelopmentsectorSpinoutsectorDiseasesectorBiotech and PharmasectorWoman FoundersectorHorizon EuropesectorDT and LS

Valuation & funding

SiSaf funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SERIES BEquity / VC Nov 2020 $13M $53M Vickers Venture Partners · Future Fund
SERIES BEquity / VC May 2018 $4.3M $17M Vickers Venture Partners · Innovation Ulster · Invest Northern Ireland
SERIES AEquity / VC Sep 2016 $3.5M $14M Vickers Venture Partners
GRANTOther financing Jan 2016 $363K Undisclosed
SEEDEquity / VC Oct 2013 $660K $2.6M SVG Partners
SPINOUTOther financing Jan 2008 Ulster University
Showing 6 recorded eventsUnlock the complete deal history →

Financials

Workforce over time

Available workforce history. Financial fields without reported data are omitted.

YearEmployees
2026 17
2025 22
2024 22
2023 26
2022 26
2021 22
2020 16
Company filings, research estimates and Dealroom dataOpen the full financial model →

Growth signals

SiSaf website traffic

Latest recorded traffic for SiSaf is 530 monthly website visits, down 33.8% over the last three months. SiSaf's team declined 22.7% over the past year.

Latest monthly visits530 3-month web change-33.8% 1-year team growth-22.7%
Monthly website visits72 observations · Dec 2016–Jul 2026
Hover or focus a point to see its exact monthly valueCompare with peers →

Comparisons

SiSaf compared with similar companies

Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.

Showing 8 of the closest matchesCompare every metric →

Talent graph

SiSaf's talent

Book a demo to see the people
Team profiled 12 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 5 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Investors

7 investors on SiSaf's cap table

Sourced from Dealroom's funding and investor records.

Seed 1 investor entered at this stage
SVG Partners
Series A 4 investors entered at this stage
Vickers Venture Partners
Innovation Ulster
Invest Northern Ireland
Future Fund
Other known 2 additional known investors
Ulster University
Clarendon Fund Managers

Global footprint

Where SiSaf has talent and traffic

Workforce by country
3 countries with
team presence
🇬🇧 United Kingdom81.3%
🇺🇸 United States12.5%
🇪🇸 Spain6.3%
3 countries shown

In the news

Latest news about SiSaf

Recent press, funding announcements, and product moves mentioning SiSaf — open to read from the original sources.

See all news

Market sentiment

What the market is saying about SiSaf

An AI-synthesized read of the highest-engagement posts about SiSaf on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

See SiSaf’s full profile on Dealroom

Request a free trial to see the complete deal history, financials, people graph and growth signals.

Takes under a minute. Already use Dealroom? Log in.