Best Email Software for Small Business - Page 2

How Many Email Software Products Does G2 Track?

Total Products under this Category: 143

Category Stats (Oct 2026)

  • Average Rating: 4.08/5 The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Jelly (+11.11%) - Among all products in this category, Jelly recorded the largest rating increase compared to last month

Last updated: October 16, 2026

How Does G2 Rank Email Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 57,400+ Authentic Reviews
  • 143+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Email Software

G2 Grid® for Email Software plotting products by satisfaction and market presence

Highlighted products: Google Workspace, Microsoft Outlook, Apple Mail, Superhuman Mail, GoDaddy Email & Office, Zoho Mail, Proton Mail For Business, and Titan.

Underlying data: [Grid® JSON](https://www.g2.com/categories/email/grids.json?focus%5B%5D=google-workspace&focus%5B%5D=microsoft-outlook&focus%5B%5D=apple-mail&focus%5B%5D=superhuman-mail&focus%5B%5D=godaddy-email-office&focus%5B%5D=zoho-mail&focus%5B%5D=proton-mail-for-business&focus%5B%5D=titan-titan&segment=small-business)

MDaemon Email Server

The MDaemon Email Server was one of the first Microsoft Exchange alternatives offered to businesses around the world. It has been developed with the ongoing input from IT professionals seeking an easy-to-use, reliable, and secure mail server that does not require expensive administration or impose high per-user costs. It simplifies messaging and collaboration with a focus on security and privacy, an intuitive, user-friendly web mail design and by offering administrators Mobile Device Management, Business Instant Messaging, Document Sharing, and other enterprise-class features that can be managed with minimal support.

Average Rating: 4.7/5.0

Total Reviews: 173

How Do G2 Users Rate MDaemon Email Server?

  • Has the product been a good partner in doing business?: 9.2/10 (Category avg: 8.7/10)
  • Ease of Use: 9.0/10 (Category avg: 8.4/10)
  • Quality of Support: 8.8/10 (Category avg: 8.2/10)
  • Ease of Admin: 9.0/10 (Category avg: 8.5/10)

Who Is the Company Behind MDaemon Email Server?

  • Seller: MDaemon Technologies
  • Company Website:
  • Year Founded: 1996
  • HQ Location: Grapevine, TX
  • Twitter: @MDaemon_Email
    649 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    32 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: IT Manager, President
  • Top Industries: Computer Software, Information Technology and Services
  • Company Size: 47% Medium, 44% Small

What Do G2 Reviewers Say About MDaemon Email Server?

AI-generated summary from verified user reviews

Pros
  • Users value the email automation in MDaemon Email Server, enhancing productivity and simplifying management across multiple domains.
  • Users value the robust security features of MDaemon Email Server, ensuring safe handling of sensitive communications.
  • Users appreciate the team collaboration features of MDaemon Email Server, which enhance productivity and streamline administration.
Cons
  • Users experience inefficient search functionality, making it difficult to find solutions in a timely manner.
  • Users experience poor customer support with MDaemon, causing delays in resolving technical issues and finding solutions.
  • Users experience slow customer support from MDaemon Email Server, leading to delays in resolving technical issues.

What Are Recent G2 Reviews of MDaemon Email Server?

What Are G2 Users Discussing About MDaemon Email Server?

Spike

Spike is an AI-powered email and team communication platform that combines email, chat, meetings, and collaboration tools into a single, organized workspace. It is designed for professionals, small teams, and businesses that use email as their primary communication channel but want a faster, more streamlined way to manage daily interactions and tasks. By transforming traditional email into a chat-like format, Spike simplifies how users read and reply to messages. The platform removes repetitive headers, quoted text, and long chains, allowing conversations to appear as clean, continuous threads. Users can manage all email accounts, calendars, and contacts in one place while taking advantage of built-in AI to summarize conversations, draft replies, and organize the inbox automatically. Spike supports both individual and team use. Freelancers and professionals use it to manage clients and projects more efficiently, while teams rely on Spike to centralize communication, share files, and collaborate in real time without switching between multiple tools. Core Features: Conversational Email: Presents emails as natural chat-like conversations while remaining fully compatible with standard email protocols. AI Productivity Tools: Provides automatic summaries, suggested replies, translations, and content drafting to speed up workflow. Priority Inbox: Uses AI to sort incoming messages into relevant categories—Priority, Other, Notes, and Starred—helping users focus on what matters most. Integrated Meetings: Enables voice and video calls directly from email threads for faster coordination. Collaborative Notes and Docs: Allows users to create, edit, and share documents in real time within the inbox. Unified Inbox and Search: Consolidates multiple email accounts and calendars into a single interface with cross-account search. Shared Inbox: Helps teams manage customer and project communications collaboratively, ensuring faster response times. Compatibility: Works with Gmail, Outlook, iCloud, Office 365, Yahoo Mail, and all IMAP-supported accounts across desktop, mobile, and web platforms. Security and Privacy: Spike is ad-free and never sells or monetizes user data. All message data is encrypted using the AES-256 standard. Spike is suited for users seeking a unified communication platform that enhances productivity while maintaining the familiarity of email. It bridges the gap between traditional email clients and modern collaboration tools, offering a single, AI-enhanced workspace that helps individuals and teams stay focused and efficient.

Average Rating: 4.6/5.0

Total Reviews: 249

How Do G2 Users Rate Spike?

  • Has the product been a good partner in doing business?: 8.6/10 (Category avg: 8.7/10)
  • Ease of Use: 9.3/10 (Category avg: 8.4/10)
  • Quality of Support: 9.0/10 (Category avg: 8.2/10)
  • Ease of Admin: 8.7/10 (Category avg: 8.5/10)

Who Is the Company Behind Spike?

  • Seller: Spike
  • Year Founded: 2014
  • HQ Location: Herzliya, IL
  • Twitter: @SpikeNowHQ
    3,036 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    29 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: CEO, Owner
  • Top Industries: Information Technology and Services, Computer Software
  • Company Size: 72% Small, 15% Medium

What Do G2 Reviewers Say About Spike?

AI-generated summary from verified user reviews

Pros
  • Users find Spike's ease of use remarkable, simplifying communications and enhancing their productivity significantly.
  • Users love the easy email management of Spike, appreciating its simple interface and organized personal messages.
  • Users love Spike's modern chat-like communication, which simplifies email management and enhances productivity through its intuitive design.
  • Users appreciate the intuitive chat-style interface of Spike, enhancing email management and reducing inbox anxiety significantly.
  • Users love Spike's chat-style interface and unified inbox, significantly enhancing productivity and email management.
Cons
  • Users note a lack of essential features in Spike, particularly impacting usability for structured and professional environments.
  • Users highlight limited features in Spike, noting message history caps and lack of search for Japanese text as significant drawbacks.
  • Users note integration issues with Spike, citing limited third-party support and occasional syncing problems with external email providers.
  • Users find Spike expensive, particularly feeling pressured towards paid plans due to limitations on the free tier.
  • Users express frustration with the limited customization options in Spike, impacting notification management and overall experience.

What Are Recent G2 Reviews of Spike?

What Are G2 Users Discussing About Spike?

Shipmail

Shipmail is business email for solo founders and small teams. You can buy a domain directly in Shipmail or connect one you already have, create mailboxes, share inboxes with teammates, and manage multiple projects from one place. Contacts, calendar, automations, and an API are built in. It’s also designed to work well with AI agents.

Average Rating: 5.0/5.0

Total Reviews: 10

How Do G2 Users Rate Shipmail?

  • Has the product been a good partner in doing business?: 10.0/10 (Category avg: 8.7/10)
  • Ease of Use: 9.6/10 (Category avg: 8.4/10)
  • Quality of Support: 10.0/10 (Category avg: 8.2/10)
  • Ease of Admin: 10.0/10 (Category avg: 8.5/10)

Who Is the Company Behind Shipmail?

Who Uses This Product?

  • Company Size: 100% Small

What Are Recent G2 Reviews of Shipmail?

AI can help you find the answers. G2 helps you trust them.

Connect G2 to Claude or ChatGPT for answers grounded in G2's trusted reviews, comparisons, and pricing from real user insights.

How it works
Connect G2 to ChatGPTConnect G2 to Claude

Zimbra Collaboration Enterprise Collaboration

Zimbra, a Synacor product, is an email and collaboration platform that includes contacts, calendar, tasks, instant messaging, and file sharing, plus add-ons such as videoconferencing, document creation, and file storage. Zimbra powers hundreds of millions of mailboxes in 140+ countries and is offered through more than 500 BSPs and 2000 channel partners. Enterprises, governments, and service providers trust Zimbra. Zimbra can be deployed in the cloud, on-premises (private cloud), or as a hybrid service. The Zimbra Business Solution Provider Network offers it as a Hosted Service. Synacor operates a turnkey, fully hosted/managed, and monetized solution for Service Providers.

Average Rating: 3.6/5.0

Total Reviews: 123

How Do G2 Users Rate Zimbra Collaboration Enterprise Collaboration?

  • Has the product been a good partner in doing business?: 7.9/10 (Category avg: 8.7/10)
  • Ease of Use: 8.2/10 (Category avg: 8.4/10)
  • Quality of Support: 7.7/10 (Category avg: 8.2/10)
  • Ease of Admin: 7.7/10 (Category avg: 8.5/10)

Who Is the Company Behind Zimbra Collaboration Enterprise Collaboration?

  • Seller: Synacor
  • Year Founded: 1998
  • HQ Location: Buffalo, NY
  • Twitter: @synacor
    1,597 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    170 employees on LinkedIn®
  • Ownership: NASDAQ:SYNC

Who Uses This Product?

  • Top Industries: Information Technology and Services, Higher Education
  • Company Size: 49% Medium, 31% Large

What Do G2 Reviewers Say About Zimbra Collaboration Enterprise Collaboration?

AI-generated summary from verified user reviews

Pros
  • Users find Zimbra Collaboration essential for daily productivity, as it simplifies communication and collaboration tasks effectively.

What Are Recent G2 Reviews of Zimbra Collaboration Enterprise Collaboration?

What Are G2 Users Discussing About Zimbra Collaboration Enterprise Collaboration?

SmarterMail

SmarterMail, available on Linux, as a Docker container, and Windows, is the only business email server with native support for Exchange protocols such as MAPI, EWS, and EAS, eliminating the need for extra software or plug-ins. SmarterMail delivers full Exchange-level functionality at a fraction of the cost, with lower hardware requirements, greater stability, and reduced maintenance. SmarterMail also includes built-in team collaboration tools like audio/video chat and Online Meetings at no additional charge. SmarterMail‘s Marketplace makes it easy to extend functionality with integrations such as OnlyOffice, Collabora, and AI platforms like ChatGPT. Plus, SmarterMail's High Availability solution ensures redundancy and fault tolerance across multiple servers.

Average Rating: 3.7/5.0

Total Reviews: 25

How Do G2 Users Rate SmarterMail?

  • Has the product been a good partner in doing business?: 8.3/10 (Category avg: 8.7/10)
  • Ease of Use: 7.5/10 (Category avg: 8.4/10)
  • Quality of Support: 7.3/10 (Category avg: 8.2/10)
  • Ease of Admin: 8.7/10 (Category avg: 8.5/10)

Who Is the Company Behind SmarterMail?

  • Seller: SmarterTools
  • Year Founded: 2003
  • HQ Location: Phoenix, Arizona
  • Twitter: @SmarterMail
    88 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    26 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 85% Small, 15% Medium

What Are Recent G2 Reviews of SmarterMail?

What Are G2 Users Discussing About SmarterMail?

Fastmail

Fastmail is a privacy-focused email hosting and productivity solution that helps businesses manage professional email communication, calendars, and contacts through a unified, ad-free platform. Founded in 1999 and independently operated from Melbourne, Australia, Fastmail provides organizations with custom domain email hosting, team collaboration tools, and administrative controls without relying on advertising revenue or scanning user data for commercial purposes. Fastmail is designed for small to mid-size businesses, professional teams, agencies, and organizations that require reliable email infrastructure paired with strong privacy practices. It supports companies that want to operate branded email addresses on their own domains. The platform also serves compliance-conscious organizations and some regulated industries through its email retention and archiving capabilities on the highest-tier plan. Fastmail's dedicated business plans offer per-user pricing with the flexibility to mix and match tiers across a team, allowing administrators to assign different storage and feature levels based on individual roles, all while reducing costs. Users can access their accounts through a polished web interface, native desktop applications for macOS, Windows, and Linux, and mobile apps for iOS and Android. The platform supports standard protocols including IMAP, SMTP, CalDAV, CardDAV, and WebDAV, ensuring compatibility with third-party clients such as Outlook and Apple Mail. Fastmail also co-authored and implements JMAP (JSON Meta Application Protocol), an open IETF standard that unifies email, contacts, and calendar synchronization under a single modern protocol. For AI-assisted workflows, Fastmail offers a Model Context Protocol (MCP) server, enabling integration with compatible AI tools and agents. Key features and capabilities include: ● Custom domain hosting and branded email addresses: Businesses can connect multiple custom domains, create individual mailboxes for team members, set up shared email addresses (e.g., support@yourbusiness.com), and configure DNS through a guided setup wizard. ● Team collaboration tools: Shared calendars, a company-wide contact address book, and shared mail folders allow teams to coordinate schedules, maintain centralized contact records, and collaboratively manage inbound communications, each from their own accounts. ● Administrative controls and user management: Account administrators can add or remove users, assign plan tiers, monitor storage usage, manage domains and aliases, and oversee account security settings from a centralized dashboard with consolidated billing. ● Privacy and security architecture: Fastmail does not display ads or scan email content for advertising purposes, and anonymizes remote image fetching to prevent tracking-pixel-based surveillance. All accounts include two-factor authentication, app-specific passwords, and session management. Data is hosted across geographically distributed data centers in the United States and the Netherlands, and the company operates under Australian law. ● Migration and interoperability: Built-in migration tools support importing email, contacts, and calendars. Open protocol support and a public JMAP API enable integration with existing workflows, automation tools, and custom applications.

Average Rating: 4.2/5.0

Total Reviews: 17

How Do G2 Users Rate Fastmail?

  • Has the product been a good partner in doing business?: 8.8/10 (Category avg: 8.7/10)
  • Ease of Use: 7.8/10 (Category avg: 8.4/10)
  • Quality of Support: 7.0/10 (Category avg: 8.2/10)
  • Ease of Admin: 7.9/10 (Category avg: 8.5/10)

Who Is the Company Behind Fastmail?

  • Seller: FastMail
  • Year Founded: 1999
  • HQ Location: Melbourne, AU
  • LinkedIn® Page: www.linkedin.com
    311 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Information Technology and Services
  • Company Size: 76% Small, 29% Medium

What Are Recent G2 Reviews of Fastmail?

What Are G2 Users Discussing About Fastmail?

Postbox

Postbox is the power email app for busy professionals. All your email accounts in one place, easy organization, fast search, a beautiful UI and a complete set of power tools that will help you manage mountains of messages. Available for both macOS and Windows.

Average Rating: 3.5/5.0

Total Reviews: 32

How Do G2 Users Rate Postbox?

  • Has the product been a good partner in doing business?: 8.3/10 (Category avg: 8.7/10)
  • Ease of Use: 8.3/10 (Category avg: 8.4/10)
  • Quality of Support: 6.6/10 (Category avg: 8.2/10)
  • Ease of Admin: 8.3/10 (Category avg: 8.5/10)

Who Is the Company Behind Postbox?

  • Seller: Postbox
  • Year Founded: 2007
  • HQ Location: San Carlos, CA
  • Twitter: @Postbox
    18,882 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    5 employees on LinkedIn®

Who Uses This Product?

  • Who Uses This: Owner
  • Company Size: 81% Small, 16% Medium

What Are Recent G2 Reviews of Postbox?

What Are G2 Users Discussing About Postbox?

HEY

Email deserves a dust off. A renovation. Modernized for the way we email today. With HEY, we’ve done just that. It’s a redo, a rethink, a simplified, potent reintroduction of email. A fresh start, the way it should be. HEY is our love letter to email, and we’re sending it to you on the Web, Mac, Windows, Linux, iOS, and Android.

Average Rating: 3.9/5.0

Total Reviews: 14

How Do G2 Users Rate HEY?

  • Has the product been a good partner in doing business?: 6.7/10 (Category avg: 8.7/10)
  • Ease of Use: 8.3/10 (Category avg: 8.4/10)
  • Quality of Support: 7.6/10 (Category avg: 8.2/10)
  • Ease of Admin: 6.7/10 (Category avg: 8.5/10)

Who Is the Company Behind HEY?

  • Seller: 37signals
  • Year Founded: 1999
  • HQ Location: Chicago, IL
  • Twitter: @basecamp
    7,061 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    176 employees on LinkedIn®

Who Uses This Product?

  • Company Size: 86% Small, 21% Medium

What Are Recent G2 Reviews of HEY?

What Are G2 Users Discussing About HEY?

KIRIM.EMAIL

The world's most affordable email infrastructure for business. Over 28,000 companies from 20 countries worldwide are already using KIRIM.EMAIL as their email infrastructure to generate more sales, build apps, and build their traffic sources.

Average Rating: 2.9/5.0

Total Reviews: 18

How Do G2 Users Rate KIRIM.EMAIL?

  • Has the product been a good partner in doing business?: 6.7/10 (Category avg: 8.7/10)
  • Ease of Use: 5.4/10 (Category avg: 8.4/10)
  • Quality of Support: 5.7/10 (Category avg: 8.2/10)
  • Ease of Admin: 5.6/10 (Category avg: 8.5/10)

Who Is the Company Behind KIRIM.EMAIL?

  • Seller: KIRIM.EMAIL
  • Year Founded: 2016
  • HQ Location: Bandung, West Java/Jawa Barat
  • LinkedIn® Page: www.linkedin.com
    21 employees on LinkedIn®

Who Uses This Product?

  • Top Industries: Marketing and Advertising
  • Company Size: 94% Small

What Do G2 Reviewers Say About KIRIM.EMAIL?

AI-generated summary from verified user reviews

Pros
  • Users appreciate the email automation features of KIRIM.EMAIL, making marketing campaigns and autoresponders effortless.
Cons
  • Users face spam issues with KIRIM.EMAIL, including unwanted spam emails and unexpected list reductions.
  • Users find the access limitations frustrating, mentioning the difficulties with the email builder and spam issues.
  • Users are frustrated by the unexpected removal of contacts and the complications of blacklisting in KIRIM.EMAIL.
  • Users face performance issues with KIRIM.EMAIL due to unexpected email deletions and blacklist complications impacting outreach.
  • Users criticize the poor interface design of KIRIM.EMAIL, finding it especially challenging and frustrating on mobile devices.

What Are Recent G2 Reviews of KIRIM.EMAIL?

What Are G2 Users Discussing About KIRIM.EMAIL?

Neeraja Prakash
NP
Researched and written by Neeraja Prakash
Updated