Postini
Postini is a venture-backed US provider of managed internet security services, founded in 1999 in San Carlos, California, that protects enterprises from malicious internet attacks via its hosted email and messaging security platform.
- Company typePrivate
- Founded1999
- HeadquartersSan Carlos, United States
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
What Postini does
Postini is a US-based, venture-backed provider of internet security services founded in 1999 and headquartered in San Carlos, California. Per the company's own description, its core offering protects enterprises from malicious internet attacks, which in the company's era mapped primarily to email-borne threats — spam, viruses, phishing, content-policy violations, and messaging infrastructure attacks — delivered as an outsourced, network-based security service rather than on-premises software.
The platform is built around perimeter security for email and messaging traffic, inspecting and filtering inbound and outbound communications against threat, content, and policy rules. Backed by a cumulative approximately $26M raised across four funding rounds between 2000 and 2003 from Bessemer Venture Partners, Mobius Venture Capital, Summit Partners, August Capital, and a strategic investment from Sun Microsystems, the company scaled to 101-250 employees during the early-2000s build-out of the cloud-based security services category. The Sun Microsystems investment indicates an OEM or distribution channel into Sun's enterprise base, complementing direct sales to mid-market and enterprise customers.
The business model is consistent with a managed-service or SaaS-style subscription, in which customers route messaging traffic through Postini's hosted security infrastructure under recurring contracts — though the input data does not disclose specific pricing tiers, contract structures, or revenue mechanics. The company remains private, and the input data does not document any subsequent ownership change, acquisition, or public-market event.
Postini firmographics
Firmographics- Name
- Postini
- Website
- http://postini.com
- Company type
- Private
- Founded year
- 1999
- Headcount range
- 101–250 employees
- Short description
- Postini is a venture-backed US provider of managed internet security services, founded in 1999 in San Carlos, California, that protects enterprises from malicious internet attacks via its hosted email and messaging security platform.
- Ownership category
- akta.pro rank
Postini industry classification
Industry- Product category
- Cybersecurity Software
- SIC
- Services-Computer Programming Services (7371)
- akta.pro primary industry
- Web Security Gateways (SWG) & Secure Web Proxy (HDADABAE)
- akta.pro secondary industry
- Threat Intelligence Services (BPAEADAC)
Keywords
Where Postini is headquartered
LocationHeadquarters
- HQ city
- San Carlos
- HQ country
- United States
- HQ region
- North America
Markets served
Postini business model
Business model- GTM type
- B2B
- Offering type
- Software
Postini product offering
Product offeringCore offering
Postini offers security solutions designed to protect companies from malicious internet attacks. The company develops and provides threat-protection software aimed at safeguarding business communications and internet-facing operations from external attack vectors.
Differentiator
Problem solved
Functional benefit
Products and services
- Internet Attack Protection Solutions Software-based security offerings that detect and prevent malicious internet attacks targeting company communications and internet-facing operations. Sold to businesses seeking protection from external cyber threats.
Postini technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Postini partnerships and signals
Strategic signalRecent moves4 records
Expansion highlights2 records
Postini competitors and assessment
Company assessmentMarket position
Competitive moat3 records
Key highlights5 records
Customer concentration
Postini social profiles
Digital presencePostini financial estimates
Financial estimateRevenue estimate
Valuation estimate
Postini leadership team
Management profileNumber of profiles
Postini funding detail
Funding detailFunding overview
Funding rounds4 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Postini M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Postini
What does Postini do?
Postini offers security solutions designed to protect companies from malicious internet attacks. The company develops and provides threat-protection software aimed at safeguarding business communications and internet-facing operations from external attack vectors.
When was Postini founded?
Postini was founded in 1999. It employs 101 to 250 people.
Where is Postini based?
Postini is headquartered in San Carlos, United States, in the North America region.
Does Postini have an API?
No public API is recorded for Postini.
What industry is Postini in?
Postini's product category is Cybersecurity Software. Its primary akta.pro industry code is HDADABAE, Web Security Gateways (SWG) & Secure Web Proxy, with a secondary code of BPAEADAC, Threat Intelligence Services. Its SIC code is 7371.