Freedom251 › Email Deliverability Software

Sendmarc

Free plan APIExtensionWeb

What Sendmarc is

Sendmarc is a paid web and API platform for managing email authentication across domains. It handles DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT, then collects DMARC reports showing senders, authentication results, and domain activity. Monitoring covers inbox placement, sender reputation, authentication, and blocklists. Lookalike Domain Defense can alert when domains resemble a customer’s domain, while Breach Detection checks sources that include the dark web for compromised systems or credentials and sends breach alerts. Sendmarc provides API access for automation and SIEM connections, plus SSO with Okta, Google Workspace, and Microsoft 365/Entra. Autotask, ConnectWise, and HaloPSA integrations support service-provider workflows. The company states SOC 2 Type II and ISO 27001 compliance, encryption in transit and at rest, access controls, and vulnerability monitoring. Support includes a knowledgebase, alert management, email, phone, and remote assistance. A free trial covers one domain, up to 5,000 emails, 21 days of data history, and one portal user.

Who it suits

Sendmarc suits businesses, enterprises, governments, SMEs, and MSPs needing domain authentication monitoring. It also fits teams requiring SSO, SIEM automation, or PSA integrations.

What it does well

Manages DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT
Collects reports on senders and authentication results
Alerts on lookalike domains and detected breaches
Provides API access and SIEM integration
Offers a free trial for one domain

What to know first

No free plan
Paid pricing requires a quote
Trial limits data history to 21 days
Only web and API platforms are listed

Limits

The free trial allows up to 5k emails, one domain, 21 days of data history, and one portal user. The Enterprise & Government plan lists unlimited emails, while the Premium and Microsoft, Google, & Yahoo Compliance plans list unlimited emails, domains, data history, and portal users; paid pricing requires a quote.

Plans

Plan	Billed and limits	Price
Free Trial	Up to 5k emails · 1 domain · 21 days data history · 1 portal user · Email & DNS analysis · Aggregate reports · 2FA	Free
Microsoft, Google, & Yahoo Compliance	Unlimited emails, domains, history and users · Premium features · Managed services · Engineer training	On request
Premium	Unlimited emails · Unlimited domains · Unlimited history · Unlimited users · DMARC/SPF/DKIM/BIMI · Forensic reports · Threat reporting · MTA-STS/TLS · SSO · Managed services	On request
Enterprise & Government	Unlimited emails · Premium features and service agreement · Specialized services · Project management · CAB approval · Supply-chain analysis · MSP implementation	On request

As sendmarc.com lists them, read 15 Oct 2026. The maker's own page has the final word.

Getting started

Open the Sendmarc website
Start the free trial
Connect a domain for email-authentication monitoring
Use the web platform or API
Configure SSO, PSA, or SIEM integrations as needed

Verdict

Sendmarc combines authentication management, reporting, reputation checks, and domain-threat alerts in one service. Its quote-based paid plans and limited trial scope should be considered before adoption.

Questions

Does Sendmarc have a free plan?

No. It offers a free trial, but no permanent free plan.

How long is the free trial?

The Free Trial plan includes 21 days of data history and allows up to 5k emails, one domain, and one portal user.

Which platforms does Sendmarc support?

Sendmarc is available through web and API access.

Which SSO providers are supported?

SSO is supported with Okta, Google Workspace, and Microsoft 365/Entra.

What integrations are listed for service providers?

Sendmarc lists Autotask, ConnectWise, and HaloPSA integrations.

Facts from Sendmarc's own pages

API: Sendmarc provides API access for automation and integration with SIEM systems. · sendmarc.com, 9 Oct 2026
API token handling: API tokens are created from user administration, assigned rights and shown once for secure storage. · help.sendmarc.com, 15 Oct 2026
Authentication standards: The platform supports DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT management. · sendmarc.com, 9 Oct 2026
BIMI: Sendmarc supports BIMI configuration and hosting so brand logos can appear in recipient inboxes. · sendmarc.com, 15 Oct 2026
Breach detection: Breach Detection provides dark-web and credential-breach monitoring as an add-on to Premium. · sendmarc.com, 15 Oct 2026
Browser extension: A partner-portal domain-scoring extension supports Chrome and Firefox and requires a Sendmarc API personal access token. · help.sendmarc.com, 15 Oct 2026
Company history: Sendmarc says it was founded by Sam Hutchinson, Keith Thompson, and Sacha Matulovich; it does not state a founding year on the page. · sendmarc.com, 9 Oct 2026
Company profile: LinkedIn lists Sendmarc as privately held, founded in 2018, headquartered in Wilmington, Delaware, with 51–200 employees. · linkedin.com, 15 Oct 2026
DMARC automation: The service collects XML DMARC reports, analyzes them and presents actionable findings with automated alerts. · sendmarc.com, 15 Oct 2026
DNS management: Sendmarc generates and manages DMARC, SPF and DKIM records through guided delegation and hosted records. · sendmarc.com, 15 Oct 2026
Documentation: The help center contains portal guides, partner guides and integration articles covering reports, DNS, DMARC, SPF, DKIM and SPF flattening. · help.sendmarc.com, 15 Oct 2026
Forensic reporting: Premium plans include forensic failure reports, blocklist reporting and threat reporting. · sendmarc.com, 15 Oct 2026
Founders: Sendmarc says it was founded by Sam Hutchinson, Keith Thompson and Sacha Matulovich. · sendmarc.com, 15 Oct 2026
Headquarters: Wilmington, Delaware, USA · sendmarc.com, 28 Sept 2026
Intended customers: Sendmarc describes its solutions as serving businesses of all sizes, including enterprises, governments, SMEs, and MSPs. · sendmarc.com, 9 Oct 2026
Legal entity: The privacy policy identifies Sendmarc Inc. as registered in the USA under SR#20230211167 at 221 W 9th St, Wilmington, Delaware. · sendmarc.com, 15 Oct 2026
Licence: The terms grant a limited, non-exclusive subscription right to cloud services, prohibit copying or reverse engineering, and reserve intellectual property to Sendmarc. · sendmarc.com, 15 Oct 2026
Limit: beginner guidance: Some G2 reviewers say technical reporting is difficult for nontechnical users and ask for stronger tutorials, onboarding and executive summaries. · g2.com, 15 Oct 2026
Limit: DNS dependency: A G2 reviewer notes that incorrectly configured SPF or DKIM limits the effectiveness of a reject policy. · g2.com, 15 Oct 2026
Listed price on Capterra: Capterra displays a starting price of $45 flat rate per month and marks a free trial and free version as available. · capterra.com, 15 Oct 2026
Lookalike defense: Lookalike Domain Defense monitors impersonating domains and alerts customers to them. · sendmarc.com, 15 Oct 2026
MTA-STS and TLS-RPT: The service manages MTA-STS and TLS reporting records for encrypted mail transport visibility. · help.sendmarc.com, 15 Oct 2026
Notable release: portal security: In May 2025 Sendmarc added mandatory email verification before portal access and removed password fields from user creation. · releases.sendmarc.com, 15 Oct 2026
Other integrations: The help center lists integrations for Abnormal Security, Acronis, ConnectWise PSA, HaloPSA and Autotask. · help.sendmarc.com, 15 Oct 2026

Where Sendmarc stands on Freedom251

Email Deliverability Software#10 of 31