44 Best Email Spam Filtering Services - Stop Spam 2026
Compare spam filtering services to protect your inbox. Machine learning detection, false positive rates, and integration options. Block spam without losing legitimate email.
Email Spam Filtering Service Comparison
| Email Service | Pricing | Storage | Attachments | Open-Source | Sandboxed Encryption | Unlimited Domains | Unlimited Aliases | TTI | SMTP | IMAP | POP3 | API | E2EE | OpenPGP | WKD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Forward Email⭐ SuggestedEmail for everyone | $3/mo | 10 GB pooled | 50 MB | Yes | Yes | Yes | Yes | TTI | Yes | Yes | Yes | Yes | ⚠️ Opt-in | Yes | Yes |
Spam ScannerSpam Scanner is the best anti-spam, email filtering, and phishing prevention service | Free (built-in to Forward Email) | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
EgressStop more advanced phishing attacks | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
MailinblackYour cybersecurity is our job | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
AltospamAntispam, Antivirus & Anti-Phishing Software | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
HeimdalOne Platform. Total Security. | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Check Point AvananPrevent Phishing before the Inbox with Email Security from Check Point | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
TrustifiProtect Your Business Emails with AI-Powered Security | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
LibraesvaEmail Security, Email Archiving, Phishing Awareness, DMARC | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
OOPSpamAutomate your Spam and Abuse Detection | $49/mo | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
DuoCircleProtect Email Against Phishing, Spam and Malware | Requires you to talk to a sales team | Requires 3rd party | 50 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
N‑able Mail AssureEmail protection to help you secure and scale | Requires you to talk to a sales team | Requires 3rd party | Depends on inbound/outbound (e.g. 10 MB) | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Vade SecureSimple, Sophisticated Email Security Powered by AI | Requires you to talk to a sales team | Requires 3rd party | 50 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Spam HeroCloud-Based Spam Filtering | $8/mo | Requires 3rd party | 50 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Abnormal SecurityCloud Email Security - Block Malicious Email Attacks | Requires you to talk to a sales team | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
DarktraceCyber security that learns you | Requires you to talk to a sales team (according to Amazon AWS Marketplace it may cost upwards of $30,000/mo) | Requires 3rd party | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
FortinetGlobal Leader of Cybersecurity Solutions and Services | Requires you to talk to a sales team | Unknown | Unknown | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Cisco Secure Email DefenseAdvanced protection to safeguard your inboxes | Requires you to talk to a sales team | Unknown | 100 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
BarracudaCybersecurity Solutions: Email, Apps, Network, Data | Requires you to talk to a sales team | Unknown | 100 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
SpamTitanEmail Security Solutions | Rrequires you to talk to a sales team | Unknown | 150 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
ProofpointThe leader in human-centric cybersecurity | See Proofpoint plans (requires you to talk to a sales team) (according to a Reddit thread it may cost upwards of +$1000-2000 per month) | Unknown | 150 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
MimecastEmail & Collaboration Security | See Mimecast plans (requires you to talk to a sales team) (according to a Reddit thread it may cost upwards of +$1000-2000 per month) | Unknown | 200 MB | No | No | No | No | No | ❌ Requires 3rd party | ❌ Requires 3rd party | ❌ Requires 3rd party | Yes | No | No | No |
Email Spam Filtering Service Screenshots
Forward Email
Forward Email is an open-source email service. Their website says: Email for everyone
Spam Scanner
Spam Scanner is a closed-source email service. Their official description reads: Spam Scanner is the best anti-spam, email filtering, and phishing prevention service
Egress
Egress is a closed-source email service. According to their website: Stop more advanced phishing attacks
Mailinblack
Mailinblack is a closed-source email service. Their official description reads: Your cybersecurity is our job
Altospam
Altospam is a closed-source email service. Their website says: Antispam, Antivirus & Anti-Phishing Software
Heimdal
Heimdal is a closed-source email service. Its description from its website is: One Platform. Total Security.
Check Point Avanan
Check Point Avanan is a closed-source email service. Its description from its website is: Prevent Phishing before the Inbox with Email Security from Check Point
Trustifi
Trustifi is a closed-source email service. According to their website: Protect Your Business Emails with AI-Powered Security
Libraesva
Libraesva is a closed-source email service. Their website says: Email Security, Email Archiving, Phishing Awareness, DMARC
OOPSpam
OOPSpam is a closed-source email service. Its description from its website is: Automate your Spam and Abuse Detection
DuoCircle
DuoCircle is a closed-source email service. Their official description reads: Protect Email Against Phishing, Spam and Malware
N‑able Mail Assure
N‑able Mail Assure is a closed-source email service. Their website says: Email protection to help you secure and scale
Vade Secure
Vade Secure is a closed-source email service. Their website says: Simple, Sophisticated Email Security Powered by AI
Spam Hero
Spam Hero is a closed-source email service. Its description from its website is: Cloud-Based Spam Filtering
Abnormal Security
Abnormal Security is a closed-source email service. According to their website: Cloud Email Security - Block Malicious Email Attacks
Darktrace
Darktrace is a closed-source email service. Their website says: Cyber security that learns you
Fortinet
Fortinet is a closed-source email service. Their official description reads: Global Leader of Cybersecurity Solutions and Services
Cisco Secure Email Defense
Cisco Secure Email Defense is a closed-source email service. Their website says: Advanced protection to safeguard your inboxes
Barracuda
Barracuda is a closed-source email service. Their website says: Cybersecurity Solutions: Email, Apps, Network, Data
SpamTitan
SpamTitan is a closed-source email service. Their official description reads: Email Security Solutions
Proofpoint
Proofpoint is a closed-source email service. Their official description reads: The leader in human-centric cybersecurity
Mimecast
Mimecast is a closed-source email service. Its description from its website is: Email & Collaboration Security
