DMARC Analysis Vendors and Email Tools

Learning Resources

DMARC Academy - Courses explaining DMARC fundamentals.
DMARC.org Email Authentication 101 - Digestible presentation on SPF, DKIM, DMARC, and how they function.
DMARC Reporting Sources and Compliance - This is a list of DMARC compliance capability of particular sending sources. Very useful for planning implementation.
LearnDMARC.com - An interactive Email Authentication tool that steps through SPF/DKIM authentication, and DMARC alignment/results.
M3AAWG Email Authentication Best Practices - Industry consensus on best-practice recommendations for both Senders and Receivers.

SPF RFC 7208 - Sender Policy Framework (Standards Track)
DKIM RFC 6376 - Domain Keys Identified Mail (Standards Track)
DMARC RFC 7489 - Domain-based Message Authentication, Reporting, and Conformance (Informational)
DMARCbis - Domain-based Message Authentication, Reporting, and Conformance (Active Internet Draft)
ARC RFC 8617 - Authenticated Received Chain (Experimental)
BIMI - Brand Indicators for Message Identification (Active Internet Draft)

DMARC Analytics

Postmark - (by ActiveCampaign) Sends free weekly email reports of email sources. (Truncated at 100k IPs reported per-source.)
Cloudflare - Free for the time being, currently in public beta.
URIports - $1-tier available.
DMARC Digests - (by ActiveCampaign)
MailHardener - Free-tier available.
PowerDMARC - Free-tier available.
Report-URI - Free-tier available.
Dmarcian - Free-tier available.
DMARCEye - Free tier available.
VerifyDMARC - In public beta.
Fraudmarc
MXtoolbox
Sendmarc - Free-tier available.
DMARCPal
EasyDMARC - Free-tier available.
ReachMail
Kevlarr - Free-tier available.
SendForensics
KDmarc
Glockapps
DMARC Report - Free-tier available.
GoDMARC
SimpleDMARC
Skysnag - Free-tier available.
DMARCly
OnDMARC - (by Red Sift)

Part of the same group as above, but ordered alphabetically due to unavailability of public pricing information.

Agari Brand Protection
Barracuda Impersonation Protection - (Formerly Barracuda Sentinel)
DMARC360 - Free-tier available.
DMARCAnalyzer - (by Mimecast)
DMARC Director
EmailAuth.io
Everest - (by Validity)
InboxMonster
LetsDMARC - Free-tier available.
MailMonitor - Free-tier available.
Netcraft Fraud Detection
Postmastery
ProDMARC
Proofpoint Email Fraud Defense - Note: If you use Hosted Proofpoint, Essentials, or send to Proofpoint customers, you must use EFD to see data processed by their infrastructure for your domains; Currently reports are not sent externally.
Valimail - Free-tier available.

DMARC High Definition - Through participating receivers, provides granular information on a per-sender email address basis from DMARC reports

Self-Hosted Solutions

DMARC-SRG - Basically the same as Techsneeze, but with a few extra metrics, no graphs though.
DMARC Visualizer - Leverages parseddmarc and Grafana.
Docker DMARC Reports - Dockerized version of Techsneeze; the buttons look a bit shinier.
ELK DMARC - Uses Docker, ELK, and Kibana to display data.
Fraudmarc Community Edition - Requires AWS.
Open-DMARC-Analyzer - Leverages dmarcts parsed reports to provide graphs and geographical sender IP info.
Parseddmarc - Must be used with grafana and/or splunk custom dashboards to make the data useful.
Techsneeze DMARCts report viewer - A list of DMARC RUA reports with pass/fail next to them.
Splunk TA-DMARC add-on - Needs custom dashboarding in Splunk to be useful beyond just ingestion.

Hosted SPF Solutions

Email Authentication Tools

Vamsoft SPF Policy tester - This is the most verbose SPF policy evaluator that exists currently.
Scott Kitterman's SPF Tool - Pyspf evaluator.
MXtoolbox SPF tester - Works for most cases, but can fail on certain SPF macro evaluations.