--- title: "Stalwart Software Pricing, Alternatives & More 2026 | Capterra" description: "With the help of Capterra, learn about Stalwart Software - reviews, pricing plans, popular comparisons to other Email Security products and more." source_url: "https://www.capterra.com/p/10034115/Stalwart/" page_type: "product" language: "en" --- # Stalwart Software Review 2026: Features, Reviews, Integrations, Pros & Cons Last updated on September 16, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Description](#description)[Use cases](#use-cases)[Alternatives](#alternatives)[FAQs](#faqs)[Features](#features)[Pricing](#pricing)[Support](#support) Stalwart ## What is Stalwart? Stalwart Mail & Collaboration Server is an open-source email and collaboration platform that integrates JMAP, IMAP4, POP3, SMTP, and WebDAV support in a unified system. The server includes built-in spam filtering, phishing protection, encryption capabilities, and collaboration tools for calendars, contacts, and file storage. Stalwart incorporates security measures like encryption-at-rest, transport security through DANE and MTA-STS, and granular access controls. The platform features scalability with load balancing, fault tolerance, and node auto discovery, which eliminates the need for complex coordinators or proxies. Stalwart streamlines email infrastructure by combining multiple components into a single binary with unified configuration, supporting multilingual search across seventeen languages and offering various storage and authentication backend options. ## What is Stalwart used for? [Email Security](https://www.capterra.com/email-security-software/) Top alternative Featured Overall rating Based on 0 user reviews Reviews sentiment Positive \- Neutral \- Negative \- Starting price $2.4 Per User, Per Year Free trial available Includes Free Version Capterra Shortlist charts the highest-rated and most popular products... Our "Best of" badge program showcases products with the highest ratings... Our "Best of" badge program showcases products with the highest ratings... Do you work for Stalwart?[Manage this product listing](https://www.g2.com/products/stalwart/claim_requests/new?auto=true) ## Stalwart Overview Updated September 2026 AI summary Stalwart offers email security solutions for businesses of all sizes, providing tools for malware detection, phishing protection, spam filtering, and threat response. With features such as AI-driven analysis, encryption, audit trails, and integration capabilities, Stalwart can be deployed via cloud or on-premises environments, supporting organizations seeking to enhance their email protection and monitoring. ## Compare with a popular alternative Capterra selects software alternatives based on relevant features, verified user reviews and user interactions. Placement may be influenced by client status. ### Stalwart 0.0 VS. [4.9 (338)](https://www.capterra.com/p/233248/Hoxhunt/reviews/) Starting Price $2.4 Per User, Per Year Starting Price Contact vendor Free Trial Free Version Pricing Options Free Trial Free Version Ease Of Use 0.0 (0) Ease Of Use 4.9 (241) Value For Money 0.0 (0) Value For Money 4.8 (192) Customer Service 0.0 (0) Customer Service 4.8 (192) ## Stalwart alternatives [4.9 (50)](https://www.capterra.com/p/206740/Libraesva-Email-Security/reviews/) Starting price $5.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 100% of reviewers rated it above 4 stars [4.2 (754)](https://www.capterra.com/p/204113/SendGrid/reviews/) Starting price $15.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 82% of reviewers rated it above 4 stars [Microsoft Defender for Office 365](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/) [4.6 (241)](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/reviews/) Starting price Contact vendor for pricing Pricing Options Free Trial Free Version User Rating 94% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/) Highest Rated [Suped](https://www.capterra.com/p/10039796/Suped/) [5.0 (21)](https://www.capterra.com/p/10039796/Suped/#reviews) Starting price $19.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 100% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/10039796/Suped/) ## FAQs about Stalwart Overview ### What company size and specific industries is Stalwart built for? Stalwart is designed for businesses of all sizes, including SMBs and enterprises, as well as mailbox providers and privacy-focused organizations that need a secure, high-performance, self-hosted email and collaboration server. Features and Usability ### What are the key features of Stalwart? Stalwart offers email security features including phishing protection, spam filtering, spam quarantine, email attachment protection, and email filtering. It also includes anomaly and malware detection, encryption, two-factor authentication, audit trail, real-time monitoring, reporting and analytics, alerts and escalation, and third-party integrations. Pricing ### How much does it cost and what fees or limitations are included? Stalwart starts at $2.40 per user per year for the Enterprise Edition, billed per mailbox annually. A free version and free trial are available. The plan includes AI-Powered Sieve Scripts, branding options, enhanced telemetry, multi-tenancy, and premium support, with no other fees or limitations listed. Getting Started and Support ### What training and onboarding options does Stalwart offer? Stalwart provides in-person training, live online sessions, and documentation. In-person training supports face-to-face instruction, live online sessions allow guided remote learning, and documentation gives teams written materials for self-paced reference and ongoing product review. Getting Started and Support ### What customer support options does Stalwart offer? Stalwart provides Email/Help Desk, FAQ/Forum, Knowledge Base, Phone Support, and Chat. These channels give users several ways to find answers or contact support. No reviewer feedback about support quality, response times, or common frustrations is available for this product. ## Features AI summary Based on 1,078 Email Security reviews Capterra data shows that buyers of email security software rank the following features as their top priorities: - **Threat Response** (**49%** of reviewers rated this feature as critical) - **Email Attachment Protection** (**58%**) - **Threat Protection** (**51%**) Stalwart supports all three features that reviewers rate as most important: **Threat Response**, **Email Attachment Protection**, and **Threat Protection**. Together, these capabilities help businesses detect and block harmful messages, protect users from risky attachments, and respond to threats more quickly, allowing teams to reduce email-based risk and maintain safer day-to-day communication. Activity Dashboard Dashboard to view the status of ongoing processes, identify current incidents and track past activities AI/Machine Learning Software program that continuously adjusts its behavior based on observed data Alerts/Escalation System alerts about the need to escalate an issue or request Anomaly/Malware Detection Automatically identify and flag unusual behaviors and malicious software API Application programming interface that allows for integration with other systems/databases Audit Trail A record of all activities within the system, including user access, changes made, etc. Stalwart 23 features ### All Features - Activity Dashboard: Dashboard to view the status of ongoing processes, identify current incidents and track past activities - AI/Machine Learning: Software program that continuously adjusts its behavior based on observed data - Alerts/Escalation: System alerts about the need to escalate an issue or request - Anomaly/Malware Detection: Automatically identify and flag unusual behaviors and malicious software - API: Application programming interface that allows for integration with other systems/databases - Audit Trail: A record of all activities within the system, including user access, changes made, etc. - Email Attachment Protection: Provides protection against malicious attachments. - Email Filtering: Use filters to process, organize and categorize emails to identify spam, malware and other unwanted messages - Encryption: Convert data into a code for security - Phishing Protection: Identify phishing emails - Real-Time Monitoring: Active monitoring of systems, applications, or networks - Reporting/Analytics: View and track pertinent metrics to find patterns and gain insights from data - Scheduled/Automated Reports: Set a time to generate routine reports automatically - Security Auditing: Systematic evaluation of the security of a company's overall security system and situation - Spam Analysis: Analysis and detection of spam-related traffic - Spam Blocker: Filters used to determine different types of malware threats - Spam Quarantine: Feature in email systems that identifies suspicious or unsolicited emails and holds them in a separate folder for review or deletion - SURLB/URIBL Filtering: Rejecting phishing emails that include suspicious URLs or links to websites that have been previously flagged. - Third-Party Integrations: Set up connections to third-party platforms to improve business processes - Threat Protection: Protect incoming and outgoing communications against malware, spam, display spoofing, and other threats - Threat Response: Identifying, analyzing, and mitigating security issues and taking appropriate action to protect systems and data from potential harm - Two-Factor Authentication: Extra layer of security that requires not only a password and username but also something specific to that user - Whitelisting/Blacklisting: Control system access and/or deliverability for applications and email addresses --- ## Pricing Free Trial Free Version [View pricing plan details](https://www.capterra.com/p/10034115/Stalwart/pricing/) Enterprise Edition $2.40 Per User,Per Year It includes: - AI-Powered Sieve Scripts - Enhanced Telemetry - Multi-Tenancy - Branding Options - Premium Support ## Support, customer service and training options Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Deployment - Web - Android - iPhone/iPad Typical users - Freelancers - Small businesses - Mid size businesses - Enterprises ## Top-rated software of 2026 ### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox.