Litmus alternatives

Reachkit, the company behind this page, makes a cold email tool. It isn’t on this list because it doesn’t render emails across clients, run placement tests or read DMARC reports. Every alternative’s price below was checked in October 2026 on that vendor’s own pages; Litmus’s old prices come from trade coverage.

Litmus, now sold by Validity as part of Validity Engage, covers three jobs that matter here: client previews and pre-send QA, inbox placement and reputation monitoring, and SPF, DKIM and DMARC tracking. Most teams moving off it need one or two of those, at a price they can read before a sales call. Pick by the job:

• Client previews at a published price: Email on Acid, now sold as Mailgun Inspect, from $99 a month for 1,000 previews.
• Checking the email your own app sends, before release: Mailtrap’s Email Sandbox, free for 50 test emails a month, then from $17.
• Placement tests on a monthly budget: Mailgun Optimize, $49 a month, or $99 with blocklist monitoring.
• Placement tests and list cleaning on one bill: ZeroBounce ONE, $99 a month.
• A placement report now and then, with no subscription: Emailable, 100 credits a report, from $38 for 5,000 credits.
• DMARC enforcement with records it manages for you: EasyDMARC, from $44.99 a month.
• DMARC monitoring on a small budget: dmarcian, from $24 a month.

None of the seven covers all three jobs at one published price, so plan on pairing two.

Entries 1 and 2 replace Litmus’s previews and pre-send checks, 3 to 5 its inbox placement data, and 6 and 7 its SPF, DKIM and DMARC tracking.

Email on Acid, founded in Denver in 2009 and part of Sinch since 2021, does the job Litmus is best known for: you send a campaign from your ESP to a test address, or paste in the HTML, and it shows how the email renders in 100+ clients and devices. In April 2026 Mailgun, Sinch’s email brand, named Mailgun Inspect as Email on Acid’s successor, and emailonacid.com now sells Inspect plans.

Price (October 2026): Mailgun’s Inspect pricing page lists Basic at $99 a month for 1,000 previews and Premium at $199 for 2,000, each free for the first month, with extra previews at $0.15. Premium adds accessibility tests, HTML code analysis, link and image checks and spam content checks. Each client screenshot is one preview, so a test across 100 clients uses 100.

Strengths:

• A price you can see before you talk to anyone, with unlimited users and API access on every plan.
• Accessibility checks against WCAG 2.2, plus Chrome and VS Code extensions added in June 2026.

Drawbacks:

• Previews are now capped. The old Email on Acid plans had unlimited testing, and a Reddit user noted the new entry plan “is now limited to 1,000 email previews”.
• The reviews predate Inspect: 4.5 on G2 from 43 reviews and 2.2 on Trustpilot from 66, few of them recent. The spam test always sends from Mailgun’s IPs, so it checks your content, not your own sending setup.

Versus Litmus: both render in 100+ clients, and Premium’s 2,000 previews cost $199 where Litmus’s last public plan charged $500 for the same number. Litmus keeps placement and reputation data in the same login; Sinch sells that separately as Mailgun Optimize (entry 3). Email on Acid profile

Mailtrap, built by the product studio Railsware, started as an Email Sandbox: a fake inbox your staging or test environment sends to, so test emails never reach real customers. Every caught email shows its HTML, its headers, a spam score and how the markup holds up across email clients. Mailtrap also sells a sending API and an email marketing product, each billed on its own.

Price (October 2026): the free Sandbox catches 50 test emails a month. Basic costs $17 a month for 500, Team $42 for 5,000, Business $123 for 50,000 and Enterprise $498, or $14, $34, $99 and $399 a month billed yearly. Device Previews, renderings in 100+ client and device setups added in August 2026, are available on request for Business and Enterprise, with no published price.

Strengths:

• A free plan and a $17 entry point, where Litmus starts with a sales form.
• It fits a code workflow: point your SMTP settings or API calls at the sandbox, and Mailtrap’s official MCP server lets an assistant like Claude or Cursor read caught messages while you code.

Drawbacks:

• Full client renderings only come with Business ($123 a month) and up, and only on request.
• The free plan is for one user. Mailtrap’s terms require a paid plan for commercial use or more than one user.

Versus Litmus: Litmus checks campaigns marketers build in an ESP. Mailtrap catches what your own product sends before a release, such as password resets and order confirmations. G2 rates it 4.8 from 77 reviews. Mailtrap profile

Mailgun Optimize is the deliverability product of Sinch’s email family, sold separately from Mailgun’s sending service. Its core is the inbox placement test: a copy of your email goes to test inboxes at the big mailbox providers, and the report shows which ones filed it in spam.

Price (October 2026): Pilot is $49 a month with 25 placement tests and 2,500 address validations. Starter is $99 with 50 tests, 5,000 validations, spam trap monitoring for one domain, blocklist monitoring for one IP and one domain, and Google Postmaster Tools and Microsoft SNDS data in the same account. Both include unlimited users and a free first month; extra tests cost from $0.75. Larger setups are priced by contract (Optimize pricing).

Strengths:

• Monthly prices on the page and a free month to test them.
• Starter pulls in Gmail’s and Microsoft’s own reputation dashboards next to your test results.

Drawbacks:

• Starter watches one IP and one domain for blocklists; more needs a contract.
• Mailgun’s ratings (4.2 on G2 from 321 reviews, 4.1 on Trustpilot from about 1,540) rate Mailgun as a whole, not Optimize alone.

Versus Litmus: Litmus’s deliverability module, which carries the placement and reputation data Validity used to sell as Everest, is pitched at “the world’s largest senders” and priced by sales. Optimize starts at $49 and has no previews, but paired with Inspect from entry 1 it covers previews and placement from one vendor for $148 to $298 a month (my math). Mailgun profile and Mailgun alternatives

ZeroBounce, an email validation company based in Santa Barbara, sells ZeroBounce ONE: a subscription that bundles list cleaning with deliverability tools. That mirrors Validity, Litmus’s owner, which folded its BriteVerify data-quality product into Validity Engage in July 2026.

Price (October 2026): ONE costs $99 a month ($79 on yearly billing). That buys 10,000 validation credits and, every month, 100 placement tests across 20+ providers, 10 blacklist monitors that rescan every 8 hours, DMARC monitoring for one domain, 100 email server tests and 250 warmup seeds. Leftover credits carry into the next month; leftover tests and monitors are lost. Sign up with a business domain and the free plan includes 100 validations a month, plus a placement test and a blacklist monitor.

Strengths:

• Twice the placement tests of Mailgun Optimize Starter for the same $99, with list cleaning included.
• A large review base: 4.8 on Capterra from about 595 reviews and 4.8 on Trustpilot from about 2,136.

Drawbacks:

• No rendering previews, and DMARC monitoring covers a single domain.
• G2 reviewers say the credit cost adds up on large or frequently cleaned lists.

Versus Litmus: ONE has no contract, and a first subscription can be refunded within 30 days if usage stays under ZeroBounce’s stated limits. Litmus’s terms refund nothing for unused time. What ONE lacks is Litmus’s rendering side. ZeroBounce profile and NeverBounce vs ZeroBounce

Emailable, a New York-based email verification company established in 2017, also sells Inbox Reports. For each one you send your email to a seed list at providers like Gmail, Outlook and Yahoo, and the report shows where it landed, with SPF, DKIM and DMARC results, a SpamAssassin score and a blacklist panel.

Price (October 2026): credits instead of plans. A report costs 100 credits and a blacklist check 5. The smallest pack is 5,000 credits for $38, enough for 50 reports, or you subscribe at 15% off. Credits never expire, and new accounts get 250 free, enough for two reports (my math).

Strengths:

• About $0.76 a report at the smallest pack (my math), with no monthly fee and nothing that expires.
• Users praise the ease of use: 4.8 on G2 from 277 reviews and 4.7 on Capterra from 333.

Drawbacks:

• A spot check, not monitoring: no previews, no reputation dashboard and no DMARC reports.
• Trustpilot shows 1.9 from 262 reviews, and its one review from the last 12 months is a one-star. Four reviewers there, from 2022 to 2026, describe being refused a refund or an adjustment, and Emailable’s terms make credit purchases non-refundable.

Versus Litmus: Litmus folds unlimited seed tests into a sales contract. Emailable charges per report, which suits a team that checks a handful of campaigns a month. Its verification service is limited to opt-in lists by its terms, which a marketing list should already be. Emailable profile

EasyDMARC, founded in 2018 and incorporated in the US, manages the records that prove your mail comes from you: SPF, DKIM, DMARC, BIMI and MTA-STS. You point your domain’s DMARC reports at it, it shows every service sending as your domain, and its guides walk you to a strict policy that tells receiving servers to reject mail passing neither SPF nor DKIM. The higher tiers add placement tests and email previews.

Price (October 2026): DMARC Plus is $44.99 a month, or $35.99 billed yearly, for 2 domains. Premium is $89.99, or $71.99 yearly, for 4 domains, a year of data and EasySPF, which keeps your SPF record under its 10-lookup limit. Both prices are for the 100,000-email tier, counted from DMARC reports, with unlimited users and a 14-day trial without a card. The Deliverability tier, with 300 placement tests and 200 email previews a month, is priced by sales.

Strengths:

• Published prices for the DMARC plans, with no seat counting.
• Reviewers praise how easy it makes SPF, DKIM and DMARC: 4.7 on G2 from more than 260 reviews and 4.8 on Capterra from 25.

Drawbacks:

• The placement tests and previews sit in a sales-quoted tier, as they do at Litmus.
• If DMARC-reported volume runs more than 50% over the plan, the dashboard locks until you upgrade. Trustpilot shows 3.2 from 8 reviews.

Versus Litmus: Litmus tracks SPF, DKIM and DMARC as one part of its deliverability monitoring. EasyDMARC runs the records themselves and the move to enforcement, which matters more if several services send as your domain. EasyDMARC profile

dmarcian, based in North Carolina, was founded in 2012 by one of the primary authors of the DMARC specification. It turns the DMARC reports mailbox providers send back into a list of every service mailing as your domain, named the way you know them (MailChimp, Office 365) rather than by IP address, with step-by-step guidance for fixing failures.

Price (October 2026): Basic is $24 a month or $19.99 billed yearly, for up to 2 domains per its plan table, 100,000 messages and one user. Plus is $240 or $199 for 8 domains and 3 users; Enterprise is $600 or $499 for 15 domains, with the API and single sign-on. Businesses get a 30-day trial without a card. The free Personal plan is for non-business use only.

Strengths:

• The lowest published entry price on this page for DMARC monitoring, with alerts by email, Slack, Teams or webhook from Basic up.
• Forwarded or spoofed mail doesn’t count toward your message allowance.

Drawbacks:

• Monitoring only: no placement tests or previews, and its public pages don’t offer to host your records.
• Basic to Plus is a tenfold price step, and reviews are too few to judge by: 3.5 on G2 from 5.

Versus Litmus: dmarcian covers one slice of Litmus’s deliverability module, the authentication tracking, for a price you can budget without a quote. dmarcian profile

Start from the Litmus feature your team actually opened every week (prices as of October 2026):

• Previews before each send. Inspect Basic ($99) covers about ten tests across 100 clients a month. Save a set of the 20 clients your list really opens in, and the same 1,000 previews stretch to 50 tests. Premium ($199) doubles the count and adds accessibility and spam content checks.
• Email your own product sends. Mailtrap’s Sandbox, free for 50 test emails a month and $42 for 5,000.
• Where campaigns land. Mailgun Optimize for a fixed monthly test budget, ZeroBounce ONE if you also clean lists, Emailable for a few reports a quarter.
• Authentication. dmarcian Basic for one or two domains; EasyDMARC if you want it to manage the records too.

If you used all of it, Inspect plus Optimize covers previews and placement for $148 to $298 a month, and a DMARC plan adds $19.99 to $89.99. Vendr’s $17,500 median Litmus contract works out to about $1,460 a month (my math). Before you cancel, check the renewal date: Litmus’s terms need 30 days’ written notice. More on its plans in the Litmus profile.

I’d split Litmus by job before replacing it. If your team mostly used previews, Inspect Premium gives you the 2,000 a month Core had, for $199 instead of $500, and its free month lets you compare renders next to Litmus before your renewal notice is due. If you used placement data, $49 to $99 a month buys tests at Mailgun or ZeroBounce. For DMARC, dmarcian starts at $19.99 a month billed yearly (all October 2026 prices). A large team using all three every day, with many seats, may still get more from Litmus’s uncapped seats and seed tests than from several separate bills.

If you were running cold emails through Litmus’s spam test, the fix sits on the sending side: separate domains, warmed inboxes and low daily volume, which is the setup I built Reachkit to handle.

Related: Litmus profile, Email on Acid profile and Mailgun alternatives.