Vendor evidence by category
Email security: what the public record shows on each vendor
In one line
nexalign holds a public evidence record on 8 email security vendors: 155 items in total, of which 105 (68 percent) come from government vulnerability registers and 19 from public practitioner threads. Every item links to the source it came from. This page reports what the record holds on each vendor. It does not rank them, because which one fits depends on criteria that live in your decision.
Vendors
8
with a published record
Evidence items
155
source and date on each
From registers
105
NVD, ENISA, CISA, BSI
Last checked
Jul 31, 2026
sources re-queried
The field, as the record has it
Ordered by the size of each record, which is a measure of how much has been published about a vendor and not of how good it is. A large record usually means a widely deployed product with an active disclosure process. Register entries are the raw count from the vulnerability databases; how many of them can be tied to a named product is decided on each vendor's own page.
| Vendor | Evidence items | Register entries | Threads | Latest |
|---|---|---|---|---|
| Proofpoint | 37 | 29 | 4 | Jul 18, 2026 |
| Cisco Email Security | 36 | 29 | 1 | Jul 18, 2026 |
| Microsoft Defender for Office 365 | 35 | 27 | 2 | Jul 18, 2026 |
| Vade | 15 | 5 | 8 | Jul 03, 2026 |
| Barracuda Email Security | 11 | 6 | 0 | Jul 18, 2026 |
| Mimecast | 9 | 3 | 3 | Jul 18, 2026 |
| Hornetsecurity | 6 | 0 | 1 | Jul 01, 2026 |
| Topsec | 6 | 6 | 0 | Apr 07, 2026 |
How to read this table
The columns are counts of published material, not scores. Subtracting one row from another produces a number, and that number means nothing: two vendors are named with different consistency by the registers, ship different amounts of product under one brand, and attract different amounts of research attention.
1 of these 8 vendors has no register entry at all. That means the public registers publish nothing under that name. It is not a finding about the product, and it is the single easiest figure on this page to misread.
What decides a purchase is absent here by design: price, contract terms, the scope of a certificate, and how the product behaves next to the systems you already run. Those belong in a decision record, not in a public one.
Questions this page answers
Which email security vendors does nexalign hold a public record on?
8, listed on this page with the size of each record. They are here because this category comes up in enterprise technology decisions, not because any of them asked or paid. The list is not a shortlist and not a market overview: a vendor appears once its record holds either an entry from a vulnerability register or a public thread naming it in the title.
Which is the best email security vendor?
This page does not answer that, and it is worth being precise about why. Best only exists relative to a decision: which criteria matter, how heavily each one weighs, what counts as a dealbreaker, and which systems the product has to live beside. Those are properties of the buyer, not of the vendor, so any public ranking has silently assumed someone else's weighting. What this page gives you instead is the record on each candidate, with the source on every item.
How many vulnerabilities are on record for email security vendors?
105 entries across all 8 vendors come from the vulnerability registers, which is 68 percent of the 155 evidence items in this category. That is the raw register count. How many of those can actually be tied to a named product of a given vendor is decided per vendor and shown on that vendor's page, because a register entry that merely mentions a company is not a vulnerability in its product.
Do more advisories mean email security products are less secure?
No, and reading it that way inverts the meaning. A register records what researchers found and what the vendor disclosed, so a widely deployed product with a working disclosure process accumulates more entries than one nobody examines. A low count can equally mean a small install base, a young product, or a vendor that publishes little. The figure worth reading closely is how many entries appear in the CISA catalogue of known exploited vulnerabilities, which is shown per vendor.
What is missing from the email security record?
1 of the 8 vendors here has no register entry at all, which means the public registers publish nothing under that name rather than that the product is clean. Beyond that, pricing, contract terms, notice periods and support commitments appear in no public register, and certification status has to be checked against the current certificate and its stated scope. None of that is on these pages.
Reading the field is the easy half
The hard half is weighing these 8 records against criteria your CISO, your CFO and your auditor all have to live with. DecisionOS takes the same evidence pool, scores it against the criteria of your actual decision, and produces a memo that holds up afterwards.