MailStore

What MailStore does

MailStore Software GmbH is a German email archiving specialist headquartered in Viersen, founded in 2006 and operating as a wholly-owned subsidiary of OpenText. The company builds on-premises and cloud email archiving software for small and medium-sized businesses (5 to 2,000 users), as well as a Service Provider Edition for managed service providers and a free consumer product (MailStore Home). Its technical foundation is an integrated Firebird-based storage engine that requires no external database, combined with SHA hash and AES256 tamper-proof encryption, journaling, full-text indexing, and de-duplication that delivers up to 70% storage savings. The product supports virtually all major email systems including Microsoft 365 (now via Graph API), Microsoft Exchange Server, Google Workspace, MDaemon, Kerio Connect, IceWarp, and IMAP/POP3 servers, and is certified under GDPR and IDW PS 880.

MailStore generates revenue through a hybrid model: perpetual MailStore Server licenses (Starter Kit from $259), an annual Update & Support subscription (Standard bundled, Premium as an upsell), a monthly-subscription MailStore Cloud service (5-500 users) launched in October 2025, and MailStore SPE licensing for MSPs that host the archive on their own infrastructure. The company combines direct sales (online store, phone, email, free 30-day trials) with an extensive partner channel of value-added distributors (notably ELOVADE for DACH, VAD of the Year for 11 consecutive years), regional Cloud partners (Zen Software in the UK), and an MCAS-certified reseller and MSP network that the company claims covers more than 100 countries and 100,000 corporate customers. Customer-reported satisfaction is high (97.9% overall), and the company maintains a recurring release cadence (Versions 24.2, 24.4, 26.2) plus ongoing certifications as primary commercial levers rather than significant direct sales hiring or M&A.

Name

MailStore

Legal name

MailStore Software GmbH

Website

http://mailstore.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

51–100 employees

Short description

MailStore Software GmbH, a Viersen-based OpenText subsidiary founded in 2006, sells on-premises and cloud email archiving software to SMBs and MSPs across 100+ countries, combining perpetual licenses with a subscription Cloud product and a deep partner channel.

Ownership category

akta.pro rank

Product category

Email Archiving Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Email Archiving, eDiscovery & Compliance (HDADAKAE)

Keywords

• Email archiving software
• Cloud email archiving
• Email compliance solutions
• On-premises archiving
• Managed service archiving

Headquarters

HQ city

Viersen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. MailStore Server Perpetual Licenses: One-time perpetual license purchase for MailStore Server with pricing based on number of users. Starter Kit for up to 5 users starts at $259.00. Additional user licenses available in packs. Includes 12 months of Standard Update & Support Service.
2. MailStore Cloud Subscription: Monthly subscription-based cloud-native email archiving service with flexible scaling. User licenses and storage billed monthly with automatic renewal. No hardware or software maintenance costs. Available for 5-500 users per organization.
3. MailStore Service Provider Edition (SPE): MSPs host email archiving 'as a service' on their own infrastructure with branding options, allowing them to resell archiving services to their customers.
4. Update & Support Service: Optional premium support contracts available in 1, 2, or 3-year terms. Standard support included; Premium adds phone support, priority handling, and access to unreleased hotfix versions.
5. MailStore Home (Free): Free email archiving software for home and private users, generating goodwill and potential future business conversions.

Pricing tiers

Go-to-market motion2 records

Distribution channels7 records

Marketing channels8 records

Core offering

MailStore develops and sells email archiving software that captures, indexes, secures, and enables rapid retrieval of business email for compliance, legal hold, and mailbox-management purposes. It delivers this as MailStore Server (on-premises perpetual license for 5-2,000 users), MailStore Cloud (subscription SaaS for 5-500 users), and MailStore Service Provider Edition (SPE) for MSPs to offer archiving as a managed service, alongside the free MailStore Home product for private users.

Product overview

MailStore offers a portfolio of email archiving solutions for different market segments. The core offerings include MailStore Server (on-premises software for SMBs with 5-2,000 users), MailStore Cloud (cloud-native SaaS for SMBs with 5-500 users), and MailStore Service Provider Edition (SPE for MSPs offering email archiving as a service). MailStore Home provides free email archiving for private users. Supplementary tools include MailStore Gateway (journaling and proxy functionality for cloud services) and the MailStore Outlook Add-in/Web Access for archive access. The products support virtually all major email systems including Microsoft 365, Microsoft Exchange Server, Google Workspace, and IMAP/POP3-compatible servers.

Differentiator

Problem solved

Functional benefit

Brands

• MailStore Server: Email archiving solution for small and medium-sized businesses (SMBs)
• MailStore Cloud
• MailStore Service Provider Edition (SPE)
• MailStore Home
• MailStore Gateway

Products and services

• MailStore Server On-premises email archiving software for small and medium-sized businesses with 5 to 2,000 users. Available as a perpetual license starting at $259.00 for a 5-user Starter Kit, it supports Microsoft 365, Exchange Server, Google Workspace, and IMAP/POP3 servers, and includes compliance features such as retention policies, legal hold, full-text search, and tamper-proof storage.
• MailStore Cloud Cloud-native email archiving service for small and medium-sized businesses with 5 to 500 users, delivered as a monthly subscription. Hosted in an ISO-certified German data center with 99.9% availability SLA, MailStore Cloud requires no hardware investment, includes GDPR and IDW PS 880 certification, and supports Microsoft 365 and Google Workspace via APIs.
• MailStore Service Provider Edition (SPE) Email archiving product for Managed Service Providers that lets them deliver archiving as a hosted, multi-tenant managed service to their own SMB and mid-market customers. MSPs run SPE on their own infrastructure with branding options and resell to end customers.
• MailStore Home Free email archiving software for individual home and private users. Archives personal email from sources including Gmail, Yahoo, Outlook.com, POP3/IMAP accounts, and Microsoft Outlook, used by millions of private users globally.
• MailStore Gateway Free complementary tool providing journaling and proxy functionality for archiving cloud-based email services such as Microsoft 365. Distributed as a free add-on program for MailStore Server and SPE users to enable reliable cloud email capture.

Quantifiable outcome

• Up to 70% storage space savings through de-duplication and compression
• +3 more outcomes

Named customers24 records

Segments5 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

Feature10 records

Partnerships

Eight partnerships are on record, tiered regional, core and minor.

• MicrodiumregionalChannel Partner/ Reseller/ Distributor · 1 January 2025Microdium from Malaysia named MailStore Partner of the Year 2025. Has been part of MailStore's international partner network for approximately 14 years, demonstrating long-term partnership commitment in the Asia-Pacific region.
• ELOVADEcoreChannel Partner/ Reseller/ Distributor · 1 January 2025ELOVADE named MailStore VAD of the Year for the eleventh consecutive year. Primary distribution partner for DACH region (Germany, Austria, Switzerland) handling MailStore Cloud and other products. Represents exceptional consistency and depth of partnership.
• Zen SoftwareregionalChannel Partner/ Reseller/ Distributor · 1 January 2025Zen Software named first MailStore Cloud Partner of the Year. Primary UK partner for MailStore Cloud distribution, representing expansion of cloud partnership model in the British market.
• OpenTextcoreOthersMailStore is a subsidiary of OpenText, a global enterprise information management company. OpenText provides the infrastructure for MailStore Cloud, hosting the service in ISO-certified German data centers. This parent-subsidiary relationship provides capital backing, operational resources, and integration with OpenText's broader enterprise software portfolio.
• DATEVminorStrategic or Co-development PartnerDATEV Premium Partner status. DATEV is a major German software provider for tax consultants and accountants. Partnership enables integration and co-marketing opportunities with the German professional services market.
• Sistem PointminorChannel Partner/ Reseller/ DistributorItalian partner success story. Reseller using MailStore Server to solve customer email archiving problems while finding time for new valuable offerings. Demonstrates partner enablement benefits.
• CyberspaceminorChannel Partner/ Reseller/ DistributorIndian partner success story using MailStore SPE (Service Provider Edition). Expects revenue growth by selling additional services and recommends all MSPs should have email archiving in their service basket.
• Global SPminorChannel Partner/ Reseller/ DistributorFrench partner success story using MailStore SPE. Praises simple and intuitive archiving solution with web interface accessibility from any browser.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Market position

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/MailStoreSoftware
• Facebookfacebook.com/timeline
• LinkedInlinkedin.com/company/mailstore-software-gmbh

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

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

M&A

Investments

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

Frequently asked questions about MailStore