{"question": "best email security gateways for small businesses", "category": "email-security-gateways", "category_name": "email security gateways", "audience": "small-businesses", "audience_name": "small businesses", "engine": "Claude (Anthropic) with web search", "model": "claude-opus-5", "asked_at": "2026-09-07T00:03:51Z", "permalink": "https://bikoosh.com/answers/s/email-security-gateways-small-businesses-2026-09-07", "question_page": "https://bikoosh.com/answers/q/email-security-gateways/small-businesses", "brands_named": [{"position": 1, "brand": "Microsoft", "label": "mentioned"}, {"position": 2, "brand": "Microsoft 365", "label": "mentioned"}, {"position": 3, "brand": "Google", "label": "mentioned"}, {"position": 4, "brand": "Google Workspace", "label": "mentioned"}, {"position": 5, "brand": "Microsoft Defender", "label": "mentioned"}, {"position": 6, "brand": "Defender", "label": "mentioned"}, {"position": 7, "brand": "Microsoft 365 Business", "label": "mentioned"}, {"position": 8, "brand": "Microsoft 365 Business Premium", "label": "mentioned"}, {"position": 9, "brand": "IRONSCALES", "label": "mentioned"}, {"position": 10, "brand": "Proofpoint Essentials", "label": "mentioned"}, {"position": 11, "brand": "Mimecast", "label": "mentioned"}, {"position": 12, "brand": "Abnormal AI", "label": "mentioned"}, {"position": 13, "brand": "Material", "label": "mentioned"}], "sources_cited": [{"url": "https://learn.microsoft.com/en-us/office365/servicedescriptions/office-365-advanced-threat-protection-service-description", "domain": "learn.microsoft.com", "source_type": "vendor"}, {"url": "https://valydex.com/reviews/defender-office-365-review", "domain": "valydex.com", "source_type": "other"}, {"url": "https://ironscales.com/blog/the-best-email-security-companies-rankings-and-reviews", "domain": "ironscales.com", "source_type": "vendor"}, {"url": "https://consilien.com/news/best-email-security-solutions-small-business-2026", "domain": "consilien.com", "source_type": "other"}, {"url": "https://www.barracuda.com/products/email-protection/barracuda-vs-mimecast", "domain": "barracuda.com", "source_type": "other"}, {"url": "https://www.selecthub.com/email-security-software/proofpoint-essentials-vs-barracuda-email-security-gateway/", "domain": "selecthub.com", "source_type": "other"}, {"url": "https://unio.digital/compare/mimecast-vs-proofpoint", "domain": "unio.digital", "source_type": "other"}, {"url": "https://technologymatch.com/blog/proofpoint-vs-mimecast-vs-abnormal-security-email-security-comparison", "domain": "technologymatch.com", "source_type": "other"}, {"url": "https://abnormal.ai/learning/api-based-email-security-features", "domain": "abnormal.ai", "source_type": "vendor"}, {"url": "https://material.security/providers/microsoft-365", "domain": "material.security", "source_type": "vendor"}, {"url": "https://expertinsights.com/email-security/top-email-security-gateways", "domain": "expertinsights.com", "source_type": "other"}], "answer_text": "## Short version first\n\nFor a small business on Microsoft 365 or Google Workspace, the \"gateway\" era is mostly over. Don't reroute your MX records unless you have a specific reason to. The better default is: turn on what you already pay for, then bolt an API-based layer on top of the mailbox. That ordering matters more than which brand you pick.\n\n## What I'd actually recommend, in order\n\n**1. Microsoft Defender for Office 365 Plan 1 - start here if you're on M365**\nIt's included in Microsoft 365 Business Premium (~$27/user/mo), so for most small shops it's effectively zero incremental cost. Safe Links, Safe Attachments, and real-time detections cover the bulk of what a small business actually gets hit with, and detection quality has closed most of the gap with standalone vendors. The catch: the default config is permissive. You must build anti-phishing policies and populate the impersonation list with your executives and key vendors, or you're paying for something that isn't protecting you. Also: no archiving. ([Microsoft Learn](https://learn.microsoft.com/en-us/office365/servicedescriptions/office-365-advanced-threat-protection-service-description), [Valydex review](https://valyde", "answer_truncated": true, "measurement": "One answer from one engine on one date. Not a ranking and not a claim about the world; brands the engine did not name are not recorded.", "limitation": "Coverage: Claude (Anthropic) with web search. Other engines not included.", "alerts": {"name": "Answer Watch Pro", "price_usd": 79, "period": "month", "gets": "daily change alerts for up to 5 brands in what one AI answer engine says, history, CSV export. Coverage: Claude (Anthropic) with web search. Other engines not included", "url": "https://bikoosh.com/answers"}}