GlockApps' DMARC Analyzer is a tidy dashboard that ingests your aggregate reports (RUA XML), charts pass/fail rates per sending source, flags alignment issues, and alerts you when something breaks. It is a useful product. It is also not magical — every operation it performs is available in free tools. The only question is how much plumbing you're willing to do.
We run hundreds of DMARC setups a month across two mail platforms, and we've used every option below in production. This article is the comparison we wish we'd had when we first started auditing DMARC for clients: what each free tool actually does, where it breaks, and when paying GlockApps is the right call.
If you have zero DevOps capacity, use Postmark DMARC Digest — free, weekly email digests, no infrastructure. If you want a proper dashboard and have an hour, self-host parsedmarc + Elasticsearch + Grafana. Everything in between is a compromise.
What DMARC analysis actually requires
Before comparing tools, it's worth understanding the moving parts, because every option on this list is solving the same three problems in different ways:
- A mailbox or bucket that receives RUA XML reports. Your DMARC DNS record points
rua=mailto:reports@example.comat somewhere. Gmail, Yahoo, Microsoft and thousands of smaller ISPs email compressed XML there every day. The mailbox is the intake. - A parser that reads the XML. RUA format is documented in RFC 7489. Every report lists source IPs, SPF/DKIM auth results, alignment verdict, disposition and volume. A parser turns the XML into rows in a database.
- A UI that turns rows into decisions. "Your SendGrid pool is failing DKIM alignment because the d= domain is sendgrid.net, not your root." That insight is the product.
GlockApps bundles all three in a managed product. The free stack means you operate all three yourself, or pick a tool that operates them for you at zero cost.
The five free options
1. Postmark DMARC Digest
URL: dmarc.postmarkapp.com. Cost: free forever. Setup time: 5 minutes.
Postmark runs a free service where you point your rua= at their inbox (they give you a dedicated reporting address), and they send you a weekly email digest summarising pass/fail per source. No dashboard, no login, just an email. It is the simplest option on this list by a wide margin and covers 80% of what a typical small sender needs.
Strengths: zero infrastructure, genuinely free, Postmark knows what they're doing. Weaknesses: no real-time drill-down, no per-IP filter, no historical trend charts. If a source starts failing on a Wednesday you find out on the following Monday.
2. dmarcian (free tier)
URL: dmarcian.com. Cost: free up to 1 source and 5k messages/day. Setup time: 10 minutes.
dmarcian was founded by one of the DMARC spec authors (Tim Draegen) and has the most polished free tier in the space. The free plan gives you a proper web dashboard, source identification, DNS record editor, and a small amount of historical retention. Above the free ceiling it starts at $20/mo — still less than GlockApps.
Strengths: real dashboard, excellent source fingerprinting, good DNS editor UI. Weaknesses: the 5k/day cap is tight — any bulk sender exceeds it. Pricing jumps quickly if you have multiple domains.
3. Valimail Monitor (free)
URL: valimail.com/products/monitor. Cost: free for a single domain. Setup time: 15 minutes.
Valimail Monitor is free for one domain and gives you a dashboard that identifies services sending on your behalf. The source identification is excellent — better than most paid tools — because Valimail runs a vendor database of 10,000+ sending services and maps IPs back to vendor names automatically.
Strengths: best-in-class vendor fingerprinting, enterprise-grade UI. Weaknesses: one domain only on the free tier; the paid tier is aimed at Fortune 1000 pricing. Upgrade path is brutal if you need two domains.
4. Self-host parsedmarc
URL: github.com/domainaware/parsedmarc. Cost: free (your server). Setup time: 1–3 hours.
parsedmarc is the open-source Swiss Army knife. It reads RUA and RUF XML from an IMAP mailbox or an S3 bucket, parses it, and pushes to Elasticsearch, Splunk or a flat SQLite database. Pair with Grafana or Kibana and you have a dashboard that rivals GlockApps — with full control, unlimited retention, no report limits.
Strengths: the most powerful free option, unlimited everything, excellent community. Weaknesses: you operate it. Elasticsearch is a real service with real memory requirements. If Grafana breaks at 2am, nobody is paging on your behalf.
5. EasyDMARC (free tier)
URL: easydmarc.com. Cost: free for 1 domain up to 10k aggregate reports/month. Setup time: 10 minutes.
EasyDMARC is the closest direct competitor to GlockApps in layout and feature set. The free tier is generous for a single domain, includes BIMI guidance, MTA-STS checks, and a working dashboard. Paid plans start at $35/mo — cheaper than GlockApps, comparable feature set.
Strengths: closest free-tier feature parity with paid dashboards, extra goodies (BIMI, MTA-STS). Weaknesses: the free-tier retention is short (30 days). Historical investigation means upgrading.
When GlockApps is still worth the money
Honest take: GlockApps is worth $59/mo when you need all of this in one bundle and your time is worth more than the difference:
- DMARC analysis integrated with placement testing, content scoring, uptime checks, and blacklist alerts in one login.
- A vendor relationship that sends you a human when something breaks. Self-hosted parsedmarc doesn't call you.
- Compliance environments where "we use a managed service" is an audit answer that ends the conversation.
For a two-person startup, a small SaaS, or a marketing team at a mid-size company, Postmark DMARC Digest + our free placement tool gets you 90% of the GlockApps outcome at zero cost.
A recommended setup by org size
- Solo founder / freelancer, 1 domain, <10k emails/month: Postmark DMARC Digest. Nothing to install, weekly digest is enough.
- Small business, 1–3 domains, moderate volume: EasyDMARC free tier on the main domain, Postmark Digest on secondaries.
- SaaS with engineering resources, any size: self-host parsedmarc + Grafana. The one-time setup cost amortises fast.
- Enterprise, 5+ domains, compliance pressure: GlockApps or dmarcian paid. The managed piece is the point.
How to pair DMARC analysis with placement testing
DMARC reports tell you who is failing authentication. They don't tell you where the mail actually landed. A passing DMARC verdict can still deliver to Spam if content, list hygiene or reputation are weak. An inbox placement test closes that gap: send a probe to seed addresses across Gmail, Outlook, Yahoo, Mail.ru and observe the folder each provider filed it in.
Our free tool runs that test unlimited, no signup. Pair it with any DMARC analyser above and you have the two halves of a complete deliverability picture — authentication and placement — for $0/mo.
If you've just rolled out DMARC, the first thing to verify isn't the dashboard — it's whether reports arrive at all. Send yourself a test email and check that your rua= mailbox receives XML within 24 hours. If nothing shows up, the DMARC record is likely malformed or the destination is bouncing.