MailGuard · 3-way comparison

Mimecast vs. Proofpoint — and when Conbool is the better choice.

If you are torn between Mimecast and Proofpoint, a third look is worth it. This page compares the three email security platforms against publicly verifiable criteria – as of May 2026.

Request a demoMailGuard in detailLast updated: May 2026

In three sentences

What actually matters.

Mimecast Advanced Email Security and Proofpoint Email Protection are both established global platforms with different focuses: Mimecast positions itself as an SEG with bundle editions, Proofpoint as a platform spanning SEG, Insider Threat Management and Awareness. Conbool MailGuard is the German alternative with EU hosting, modular licensing and pre-built DACH DLP detectors. Which of the three fits best depends on hosting requirements, platform breadth and contract flexibility.

The five most common questions in a 3-way comparison.

Every claim about Mimecast and Proofpoint links to a public source; every Conbool claim can be verified during a demo.

Where is my data hosted?

Conbool MailGuard

Exclusively in EU data centers on ISO 27001 certified infrastructure. The contracting party and data processor is Conbool GmbH in Germany. On request the data location is explicitly named in the DPA.

Mimecast

According to its public Trust Center, Mimecast operates several global cloud regions, including the US, UK, Germany, South Africa and Australia. Which region is active for your tenant is governed by the contractual region assignment.

Source: Mimecast Trust Center, "Data Centers / Service Locations" (publicly available on mimecast.com). Please confirm the region for your specific tenant with the vendor.

Proofpoint

According to its public Trust Center, Proofpoint also operates multiple global data centers, including EU locations. The data region is agreed in the Order Form or Service Agreement.

Source: Proofpoint Trust Center and "Data Processing Addendum" (publicly available on proofpoint.com). The specific region assignment is governed by the relevant contract.

Why this matters: GDPR records of processing, NIS-2 risk assessments and KRITIS requirements all need the actual data location documented – with global vendors this is tenant-specific.

How is licensing structured?

Conbool MailGuard

Modular per feature. Phishing protection, attachment sandbox, DLP and audit log can be booked individually or as a bundle. Contract term monthly or annual, without multi-year minimum commitment.

Mimecast

Mimecast bundles features into editions (historically S1/S2/S3, now "Advanced", "Advanced Plus" and "Industry Leading"). Which feature lives in which bundle is governed by the current package overview.

Source: Mimecast Product Overview and bundle comparison on mimecast.com (public, as of 2024+). Contract terms are negotiated by Mimecast directly.

Proofpoint

Proofpoint sells Email Protection in editions P0, P1, P2 and P3 with ascending scope (anti-spam, Targeted Attack Protection, DLP, email encryption). Add-on modules such as TAP, Information Protection or ITM are licensed separately.

Source: Proofpoint Product Bundles, P0–P3 edition comparison on proofpoint.com (public, as of 2024+). Multi-year enterprise contracts are standard.

Why this matters: If you do not need every feature or want short cancellation flexibility, the licensing model shows up directly in total cost of ownership.

How broad is the platform?

Conbool MailGuard

MailGuard is part of a four-module bundle of MailGuard, SecureMail (email encryption), Disclaimer (signatures) and SecureFiles (secure file transfer). Modules are individually bookable and share admin portal and audit log.

Mimecast

Mimecast positions itself as an SEG-focused email security platform centered on bundle editions. Awareness Training and Archiving are offered as add-on products.

Source: Mimecast product overview on mimecast.com (public, as of 2026). Feature details per edition see Mimecast bundle comparison.

Proofpoint

Proofpoint is positioned as a broad platform: Email Protection, Targeted Attack Protection (TAP), Email DLP, Information Protection, Insider Threat Management and Security Awareness Training are marketed as one integrated platform.

Source: Proofpoint product portfolio on proofpoint.com (public, as of 2026), including the Nexus AI threat intelligence layer.

Why this matters: If you need a broad platform, Proofpoint groups the most modules under one roof. If you prefer a lean email security focus with targeted add-on modules, Mimecast or Conbool is the simpler path.

What DACH-specific DLP detectors exist?

Conbool MailGuard

DLP detectors with a DACH focus: German IBAN with checksum, VAT IDs (DE, AT, CH-UID), Swiss AHV number, German tax ID, social security number. Custom detectors via regex and lookup lists per tenant.

Mimecast

Mimecast provides DLP capabilities with many predefined detectors. Which regional focus areas are covered is governed by the current detector library.

Source: Mimecast DLP Documentation, "Predefined Content Types" (public, as of 2024+). Please verify DACH-specific detectors with the vendor.

Proofpoint

Proofpoint Email DLP and Information Protection use a substantial pool of predefined Smart Identifiers. DACH-specific identifiers are partly included; custom identifiers can be created via regex or dictionary matching.

Source: Proofpoint Email DLP Documentation and Smart Identifier Catalog (public, as of 2024+). Please verify DACH-specific requirements with the vendor.

Why this matters: If your compliance scope requires German or Austrian identifiers (VAT ID, AHV), pre-built DACH detectors save custom regex effort.

What contract term and cancellation are typical?

Conbool MailGuard

Bookable monthly or annually without multi-year minimum term. Notice periods are short and explicitly stated in the DPA; modules can be activated or paused individually.

Mimecast

Mimecast contracts are sold directly and in practice are usually multi-year (typically one to three years). Renewals are governed by the Order Form.

Source: Mimecast Order Form notes and sales guidelines (publicly circulated reseller materials, as of 2024+). Please negotiate the specific term with the vendor.

Proofpoint

Proofpoint enterprise contracts are also predominantly multi-year (typically one to three years), with auto-renewal clauses per Order Form.

Source: Proofpoint Master Service Agreement and Order Form terms (publicly referenced on proofpoint.com). Contract details are negotiated directly.

Why this matters: Multi-year lock-in with global platforms often only becomes visible at cancellation time. If flexibility is a priority, anchor term and auto-renewal explicitly in your requirements.

Migration checklist

What to do when switching from Mimecast or Proofpoint.

Replacing either Mimecast or Proofpoint runs as a parallel MX migration in both cases. This checklist works for existing contracts with either vendor – the steps apply regardless of which incumbent you have.

  1. 1. Review existing contracts – which one expires when?

    Clarify first which contracts are currently active (Mimecast bundle, Proofpoint edition, or a combination of both), when they expire and whether auto-renewal applies. Document notice periods, audit dates and any double-cost overlap windows.

  2. 2. Switch MX records to Conbool

    Conbool is set as the new primary MX, with the incumbent remaining in parallel at lower priority. This lets you validate DLP, BEC and attachment rules on representative mail before the full cutover.

  3. 3. Parallel DLP migration: export and map policies

    From the Mimecast Administration Console or Proofpoint Admin, DLP, anti-phishing and URL protection policies are exported. Conbool policies are built on that basis, so you do not start from zero.

  4. 4. Consolidate reports and SIEM integration

    Audit log, quarantine reports and SIEM integrations are moved to the Conbool tenant. Existing Mimecast or Proofpoint dashboards remain visible in parallel during transition.

  5. 5. Let existing contracts expire on schedule

    After 14–30 days with no mail traffic on the legacy systems, the tenants are decommissioned in a controlled way. Respect data retention per contract, take over quarantined mail if needed, terminate on time.

These steps are an experience-based template, not a substitute for individual migration consulting. In the advisory session we adapt the sequence to your specific Mimecast and Proofpoint contracts.

Decision guide

When Conbool, when Mimecast, when Proofpoint.

Conbool MailGuard fits when …

  • You must document EU hosting and a German contracting party as a requirement.
  • You want to license modularly per feature instead of buying a bundle edition.
  • DACH DLP detectors (IBAN, VAT ID, AHV) out of the box matter to you.
  • You prefer contracts that can be cancelled monthly or annually.

Mimecast fits when …

  • You need an established SEG platform with global region choice.
  • You prefer a bundle without Insider Threat cross-sell.
  • Existing Mimecast integrations (SIEM, M365 connectors, archiving) already run in your environment.
  • You want to keep using the established Mimecast ecosystem of resellers and consultants.

Proofpoint fits when …

  • You want the broadest platform with SEG, Insider Threat Management and Security Awareness from a single vendor.
  • Global scale with multiple regional tenants and cross-region functions is required.
  • Nexus AI as an integrated threat intelligence layer fits your SecOps pipeline.
  • You want to sign multi-year enterprise framework contracts at global corporate scale.

Related

Conbool MailGuard by industry and use case.

Also compared

More comparisons and direct side-by-sides.

Buyers choosing between Mimecast and Proofpoint often also evaluate Hornetsecurity or Microsoft Defender. Here are the direct single-comparison pages.

Frequently asked questions

See Conbool MailGuard in your own setup.

30-minute demo. Modular per feature. EU hosting.

Sources and fairness note

Statements about Mimecast on this page are based exclusively on publicly accessible sources: Mimecast Trust Center, Mimecast product pages, Mimecast Knowledge Base and Mimecast DLP documentation. Statements about Proofpoint are based exclusively on publicly accessible sources: Proofpoint Trust Center, Proofpoint product pages (Email Protection P0–P3, TAP, ITM, Information Protection), Proofpoint Email DLP documentation and the Proofpoint Master Service Agreement. We do not make claims about internal processes, architecture details or roadmap items that are not publicly documented. Statements about Conbool are based on our own product documentation, infrastructure certifications and contractual commitments.

As of May 2026. For a final decision we recommend asking all three vendors directly about the points relevant to you and asking for their answers in writing.

Mimecast is a registered trademark of Mimecast Limited or the Mimecast group. Proofpoint is a registered trademark of Proofpoint, Inc. Conbool is a trademark of Conbool GmbH. This page is an editorial 3-way comparison – not official material from Mimecast or Proofpoint.