Rockliffe

Enterprise Email and Messaging Softwarerockliffe.com

Rockliffe Systems Inc develops communication software — including the MailSite email server, AstraSync mobile PIM synchronization, and AstraChat/StealthChat secure messaging — serving service providers, enterprises, and OEMs.

Company typePrivate
Founded1995
HeadquartersCampbell, United States
Headcount11–50
GTM typeB2B
OfferingSoftware

What Rockliffe does

Rockliffe Systems Inc is a privately held developer of communication software founded in 1995 and headquartered in Campbell, California (Silicon Valley), with additional offices in the United Kingdom and Jakarta, Indonesia. The company builds messaging and synchronization infrastructure that serves three customer segments: service providers (ISPs, telcos, hosting operators), enterprises, and consumer end users via OEM-embedded deployments. Its core products are MailSite, a high-performance email server platform designed for ISP-grade clustering and large multi-tenanted deployments; AstraSync, a mobile device synchronization engine for PIM data (calendars, contacts, tasks); and AstraChat/StealthChat, secure mobile messaging applications that extend the firm's communications stack beyond email.

Rockliffe's underlying technology is built around proprietary push email and PIM synchronization, protected by multiple issued US patents in these areas. The architecture is engineered to scale to large numbers of users and to integrate with third-party platforms, which enables OEM and embedded licensing as a primary distribution model. Products are delivered on a platform-and-client model: server-side software for operators and OEMs, paired with consumer and mobile clients.

The company's business model combines OEM/embedded licensing with direct sales of MailSite messaging platforms to service providers and enterprises, alongside consumer-facing secure messaging applications. Revenue mechanics are not publicly disclosed and the firm does not appear to have taken institutional venture funding. The OEM-driven go-to-market is designed to leverage partner user bases rather than build Rockliffe's own large direct salesforce, consistent with the company's small headcount of 11-50 employees.

Rockliffe firmographics

Firmographics

Name: Rockliffe
Legal name: Rockliffe Systems Inc
Website: http://www.rockliffe.com
Company type: Private
Founded year: 1995
Operating status: Operating
Headcount range: 11–50 employees
Short description: Rockliffe Systems Inc develops communication software — including the MailSite email server, AstraSync mobile PIM synchronization, and AstraChat/StealthChat secure messaging — serving service providers, enterprises, and OEMs.
Ownership category
akta.pro rank

Rockliffe industry classification

Industry

Product category: Enterprise Email and Messaging Software
NAICS: Software Publishers (5132), Computer Systems Design and Related Services (54151)
SIC: Services-Prepackaged Software (7372), Services-Computer Programming Services (7371), Services-Computer Programming, Data Processing, Etc. (7370)
akta.pro primary industry: Secure/Encrypted Messaging (BPAMACAG)

Keywords

Email server software
Secure messaging
Push email technology
Cross-platform chat
Enterprise communication

Where Rockliffe is headquartered

Location

Headquarters

HQ city: Campbell
HQ country: United States
HQ region: North America

Markets served

Rockliffe business model

Business model

GTM type: B2B
Offering type: Software
Cost components: Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Distribution channels2 records

Marketing channels1 record

Rockliffe product offering

Product offering

Core offering

Rockliffe develops and sells email server and secure messaging software, including the MailSite email/collaboration server (a low-complexity alternative to Microsoft Exchange with push email, calendar, and contact sync), AstraChat (cross-platform secure XMPP-based chat deployed on-premise or hosted), and StealthChat (secure consumer chat). The company licenses this software primarily to internet service providers, telecom operators, and enterprises seeking ISP-grade communication infrastructure.

Product overview

Rockliffe offers a portfolio of communication software products for service providers, enterprises, and consumers. The core offerings include MailSite (email server software with calendar and contact sync as an ISP-grade Exchange alternative) and AstraChat/StealthChat (secure cross-platform chat and messaging solutions). The products are designed to be small, compact, high quality, high performance, and fully fault-tolerant.

Differentiator

Problem solved

Functional benefit

Brands

MailSite: Email Server Software - ISP-Grade Exchange Alternative with Calendar and Contact Sync.
AstraChat
AstraSync
StealthChat

Products and services

MailSite
AstraChat
StealthChat

Companies that use Rockliffe

Customer profile

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Rockliffe technology and API

Technology

Technology focussed Yes

API detail

Has API: No
API docs
API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Rockliffe partnerships and signals

Strategic signal

Recent moves5 records

Expansion highlights4 records

Rockliffe competitors and assessment

Company assessment

Direct peers

Threema: Threema provides end-to-end encrypted messaging for consumers and enterprises with on-premise options — comparable to StealthChat/AstraChat in privacy-first secure messaging and European market presence.
Element (Matrix): Element provides secure, end-to-end encrypted team messaging built on the open Matrix protocol, with on-premise deployment options — directly comparable to AstraChat in secure cross-platform chat and enterprise/government buyer focus.
Wire: Wire offers end-to-end encrypted messaging, voice, and video for enterprises and governments with on-premise deployment — directly comparable to AstraChat in secure communication architecture and regulated-buyer focus.
Rocket.Chat: Rocket.Chat is an open-source team chat platform offering self-hosted and cloud deployments with encryption and enterprise SSO — directly comparable to AstraChat in secure messaging functionality and target buyers in regulated/privacy-conscious organizations.
Atmail: Atmail provides white-label email and messaging solutions for ISPs, telcos, and hosting providers — closely comparable to MailSite in ISP-grade email serving, OEM/white-label distribution, and target customer base of service providers.
IceWarp: IceWarp provides email server and team chat solutions positioned as an Exchange alternative for service providers and enterprises, directly comparable to Rockliffe's MailSite and AstraChat in product scope, target buyers, and on-premise/hosted delivery model.
Zimbra (Synacor): Zimbra is an open-source email and collaboration platform targeting service providers and enterprises seeking Exchange alternatives — directly comparable to MailSite in positioning, customer segments, and on-premise deployment model.

Broad incumbents

Wickr (Amazon): Wickr is an AWS-owned secure messaging service offering end-to-end encrypted communication for enterprises and government — overlapping with AstraChat/StealthChat's secure messaging positioning, with the backing of a hyperscale parent.
Google Workspace: Google Workspace is a major cloud email and collaboration suite that competes for the same service-provider and enterprise customers Rockliffe targets with MailSite, representing the dominant SaaS alternative.
Microsoft (Exchange / Microsoft 365): Microsoft Exchange and Microsoft 365 dominate the enterprise email and collaboration market that MailSite targets as an alternative — Rockliffe's product positioning is explicitly framed as an Exchange replacement.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

Rockliffe financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Rockliffe leadership team

Management profile

Number of profiles

Rockliffe funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Rockliffe M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rockliffe

What does Rockliffe do?

Is Rockliffe a public or private company?

Rockliffe is a private company. It is classified as unknown and is currently operating.

When was Rockliffe founded?

Rockliffe was founded in 1995. It employs 11 to 50 people.

Where is Rockliffe based?

Rockliffe is headquartered in Campbell, United States, in the North America region.

Who are Rockliffe's main competitors?

Direct peers on record are Threema, Element (Matrix), Wire, Rocket.Chat, Atmail, IceWarp and Zimbra (Synacor). Broad incumbents are Wickr (Amazon), Google Workspace and Microsoft (Exchange / Microsoft 365).

Does Rockliffe have an API?

No public API is recorded for Rockliffe.

What industry is Rockliffe in?

Rockliffe's product category is Enterprise Email and Messaging Software. Its primary akta.pro industry code is BPAMACAG, Secure/Encrypted Messaging. Its NAICS code is 5132 and its SIC code is 7372.