Semrush Alternative 2026: Open-Source at $29/mo · Rankdelta

Semrush alternative 2026, monthly list prices read in November: Semrush $139/mo, Moz from $49, Ahrefs and SE Ranking $129, open source from $29.

Quick Answer

The best Semrush alternative in 2026 depends on why you're leaving, and the reasons have changed in the last few months. Semrush now includes AI visibility in every plan: its SEO plan, $139/month on monthly billing ($117.33 if you commit to a year; $139 and $117.33 on the USD page), lists AI-search tracking, AI sentiment and custom prompts, which used to be a separate line item. Ahrefs Lite ($129/month) includes 150 AI prompt checks and SE Ranking Core ($129) includes 25 prompts a day. Moz still sells a $49/month single-site plan, but AI visibility starts at Standard, $99/month, with 150 tracked prompts on 3 AI models. So "the others don't do AI" is no longer a reason to switch, and the price gap has narrowed too: the cheapest hosted plan here that includes AI prompts is $99 a month.

What is still genuinely different is who owns the stack. RankDelta is the only one of these that is open-source and self-hostable: from $29/month managed, or free on your own infrastructure with your own API keys, AI Share of Voice included and the scoring code in the repository (disclosed: it's our product). If you want a like-for-like hosted swap, Ahrefs. If you only use the SEO corner of Semrush and want to pay a fraction of it, the open-source route is the answer. If you run PPC, social and content inside Semrush, stay. Every price on this page was read from the vendor's own pricing page on 3 November 2026.

Why "Semrush alternative" is a different question in 2026

For a decade, choosing an all-in-one marketing suite meant weighing database size, toolset breadth, and price. Semrush won that race by being the broadest platform on the market — not just SEO, but paid search, social, content marketing, PR and competitive research in one login, on one of the largest keyword databases anywhere. That breadth is exactly why people both stay and leave: you pay for a marketing platform even when you only use the SEO corner of it.

But the ground moved this year, in two directions at once. The buying journey increasingly begins in an AI answer rather than a search box: ChatGPT, Perplexity, a Google AI Overview. Those answers name a handful of tools, and if you miss the handful you've lost the buyer before a rank report is even relevant. Then the suites responded by buying their way onto that surface: by November 2026 every major vendor sells some version of AI visibility, and Semrush folded it into the base plans instead of billing it separately — its pricing page now lists 'Track performance in AI search', 'Monitor AI sentiment' and 'Monitor custom prompts' inside the SEO plan.

So the question is no longer which alternative can see AI answers at all — most can. It splits into three: do you need the same breadth at a lower price, do you need the data to live on your own infrastructure, and do you need a number you can audit when a client asks how it was calculated? The right alternative depends on which of those you're solving.

Why people leave Semrush (each reason points somewhere different)

Semrush isn't a weak tool — it's the most complete one. People leave for one of four concrete reasons, and the reason decides the alternative.

Reason 1 — you use only a fraction of the platform

Semrush bundles PPC, social, content, and market research on top of SEO. If you only ever open the SEO tools, you're paying enterprise price for an all-in-one you half-use. That's the most common reason of all — and it points to a focused, cheaper SEO tool (Moz Pro, SE Ranking, Serpstat) that covers the part you actually touch.

Reason 2 — the price, per seat

Semrush's entry plan now costs $139/month on monthly billing ($117.33 if you commit to a year; $139 and $117.33 USD), per seat, and the tiers climb from there: Starter $199 ($165.17 billed annually), Pro+ $299 ($248.17 billed annually). Agencies juggling many clients and logins feel that fast, and the budget tier is less of a refuge than it used to be — Moz has a $49 single-site plan without AI features and its cards start at $99, while Ahrefs and SE Ranking start at $129. The open-source route cuts it differently: you pay the data APIs you actually call, not a seat.

Reason 3 — you want to own your data

Privacy-minded teams and agencies handling sensitive client data increasingly want everything on their own infrastructure, not a vendor's cloud. Semrush is a hosted platform by design: your projects, tracked keywords, client domains and competitor sets sit on its servers under its terms, and the per-seat model means the bill scales with the team rather than with the data you actually pull.

The open-source route inverts both. You self-host the suite (a Docker host plus a Supabase instance for the database and auth), bring your own API keys for SERP, keyword and backlink data, and pay those calls at cost — no seat count, no annual lock-in, and a database you can export or take with you. For agencies under client NDAs or data-residency requirements it's usually the deciding factor; for a solo consultant it's mostly a cost story. The honest limit is the same in every article of this series: Semrush's keyword database and backlink index are larger than anything you'll self-host, so the heaviest enterprise research still pairs best with a pay-as-you-go data source.

Reason 4 — you want to own the AI-visibility data, not just see it

This is the newest reason, and it changed shape this year. In 2024 and 2025 the argument was access: rank trackers couldn't see AI answers, Semrush billed AI mentions separately, so people left to get the data at all. By November 2026 that gap is closed — Semrush includes AI search tracking in every plan, Ahrefs ships 150 prompt checks on Lite, Moz 150 tracked prompts from Standard, SE Ranking 25 prompts a day on Core.

What none of them hands over is the measurement itself: the prompt list, the raw answers, the competitor set and the scoring formula stay on their servers, metered per prompt, and you cannot audit how a mention was counted. That is the reason that survives, and it is a reporting reason rather than a feature one. If you have to defend an AI Share of Voice number in front of a client, or you cannot put a client's prompt set into a third party's database, the fix is software you can run yourself. If you only want the dashboard, a hosted suite now gives you one.

The comparison (with the prices checked this month)

The six contenders at a glance

All prices are monthly-billing list prices, read from each vendor's own pricing page on 3 November 2026, in USD unless marked; Semrush served EUR, so both are shown. Monthly is the base because it is what you pay without committing to a year — annual billing is lower at every vendor and by a different amount (Moz $79/mo, Semrush $117.33, SE Ranking $103.20, SpyFu $29), which is exactly why mixing the two bases makes a comparison false. "AI visibility" = tracking whether ChatGPT / Perplexity / AI Overviews name or cite you, not a rank position. Moz lists its $49 single-site plan in a "Need a starter solution?" block below the plan cards, with no published limits, and its AI features start at Standard ($99). Serpstat is the other all-rounder in this tier: its pricing page returned a 404 when we checked, so it is not priced here.

What each tool actually measures

Prices tell you the sticker; this table tells you the job — and shows why a cheaper tool can still be the right tool. The AI row is now table stakes; the two at the bottom are not.

Directional November 2026 snapshot. The only row that still separates the open-source route from the hosted suites is data ownership: MCP access, which all three hosted suites we priced now declare (Ahrefs Lite, SE Ranking Core, Semrush Starter), is no longer a differentiator. AI visibility now sits on every hosted plan card we priced; the one exception is Moz's $49 single-site tier.

RankDelta — our pick, and the verifiable reason it's first

RankDelta is open-source AI SEO software by Agape Group GmbH. We sell it, so treat this as disclosed, not blind. It's first here for one verifiable reason, stated below.

RankDelta does the classic Semrush-style suite you'd expect from a replacement — Site Explorer with backlink and domain data, Rank Tracker, Keyword Research with free clustering, and Site Audit. What makes it the answer to this article is not access to AI visibility — Semrush, Ahrefs, Moz and SE Ranking all sell it now — but who owns the number: AI Share of Voice is included from $29/month, and the code that computes it is in the repository. It measures whether ChatGPT, Perplexity, Gemini and Google AI Overviews recommend you or someone else for your category's buying questions — then it orders the competitors the engines favour, surfaces the prompts where you don't appear, and traces the pages being cited.

Two more things matter for the reasons people leave Semrush. It's open-source and self-hostable, so client data can live on your own infrastructure and you pay only for the data APIs you use — no fixed per-seat invoice, and the managed cloud has hard per-account spend caps. And it's agent-native over MCP: Claude, ChatGPT or Cursor can operate your SEO stack directly (see best MCP server for SEO) — access Semrush and Ahrefs now sell on their entry plans too, but not an open server you host and extend. The distinction that still matters, now that every suite bundles AI visibility: you can read the code that computes the score, point the prompt runs at your own API keys, and keep the answers in your own database.

When not to pick us

If you genuinely run PPC, social, and content campaigns inside Semrush, no SEO-focused alternative — us included — replaces that breadth. And if exhaustive enterprise backlink discovery is your single most important job, the largest indexes still lead on raw scale. Two more honest cases: if a client contract names Semrush's own metrics as the reporting KPI (an Authority Score target, a Semrush-defined keyword-difficulty threshold), switching means renegotiating the KPI, not just the tool — the numbers aren't interchangeable across suites. And if you lean on its market and traffic-analytics add-ons to size a competitor's whole business, that's a breadth job no SEO suite, open-source or not, is trying to do. We'd rather tell you that than watch you churn.

The alternatives, one by one

The hosted suites: Moz, SE Ranking, Serpstat, SpyFu

Moz Pro is the friendliest of the hosted suites and the only one here with a sub-$50 plan: $49/month for a single site, which carries no AI visibility — that starts at Standard, $99/month, with 150 tracked prompts on 3 AI models. SE Ranking ($129/month) is the agency pick: a full suite with free data migration from Semrush, which removes most of the switching friction. Serpstat is the other all-rounder here, but its pricing page returned a 404 when we checked on 3 November 2026, so we haven't priced it. SpyFu leans into competitor and PPC intelligence — $39/month on Basic, where AI Brand Monitoring is included but limited (the ChatGPT integration is capped at 3 chats), and fuller AI on Pro + AI at $119/month — so it fits a narrow job well and a broad one poorly.

The open-source route

RankDelta and OpenSEO are the two self-hostable suites; add SerpBear for free rank tracking and Matomo for privacy-first analytics to complete a stack you fully own. The trade-off is real: you take on hosting and the pay-as-you-go data APIs yourself, in exchange for no subscription and full data ownership. For a fuller breakdown, see best open source SEO software.

What replaces Semrush's keyword database?

The single biggest hesitation in leaving Semrush is its keyword database — one of the largest in the industry, and the thing power users open first every morning. Your workflow is built on its volumes, difficulty scores, and related-keyword suggestions.

No alternative replicates Semrush's exact numbers, because every tool models volume and difficulty its own way — a Semrush difficulty of 40 does not map one-to-one onto anyone else's. But the underlying data most tools use (including RankDelta, via DataForSEO-class APIs) draws on the same clickstream and SERP sources, so the directional signal — which keywords are worth chasing, which cluster together — holds up well. Track the trend rather than chasing a conversion between scales that doesn't exist. RankDelta's free keyword clustering does part of the grouping work Semrush charges for, which softens the landing.

Where Semrush still wins (the honest part)

A roundup that pretends the alternatives beat Semrush on everything isn't worth trusting, so here's the real limit. Semrush's moat is breadth, and it's genuine: it's not just an SEO tool but a marketing platform — paid search, social, content, PR and market research in one login. If your team runs cross-channel campaigns and lives in that keyword database daily, switching to a pure SEO tool means stitching several products back together, and you'll likely spend more, not less, once you've re-bought the pieces.

So the honest rule: leave Semrush when you use a fraction of it — then a focused, cheaper or open-source SEO tool wins — or when the data has to live on your own infrastructure. Not for AI visibility: that is in every plan now, so it is no longer a reason to move. Stay when its cross-channel breadth is genuinely part of how your team works. On rank tracking, audits, keyword research and AI visibility the alternatives are competitive; on the widest marketing toolkit, Semrush still leads.

How the AI-visibility gap actually costs you

Why does the AI-visibility column matter? Google now surfaces AI Overviews above the classic results for a large share of informational and commercial queries, and reports some generative-AI impressions inside Search Console. Buyers, meanwhile, increasingly start in ChatGPT or Perplexity rather than in a search bar.

So a common failure mode looks like this: you rank #2 on Google for "best [category] tool", every Semrush metric is green — and yet the AI Overview and ChatGPT both recommend a competitor, because they synthesised a different set of sources. You never see it in a rank tracker, because a position-two blue link is not a citation. AI visibility is a separate surface with separate winners. Every major suite now shows you that surface; what none of them shows is how the number was produced.

This is what it looks like when you actually measure it. Below is a live AI-visibility diagnosis RankDelta. Asked "what are the best AI SEO tools?", ChatGPT lists SEMrush first — the exact blind spot a rank tracker can't show:

Worth noting which lists diverged: the six competitors the tool discovered from keyword overlap (Onelittleweb, Searchatlas, Athenahq, Zapier, Whatagraph, Rankability) were not the brands ChatGPT actually put in front of a buyer — the two sets barely touch. Semrush's breadth shows you the first list; only the AI layer shows you the second.

Live scan, rankdelta.ai, September 2026. The tool measures the surface a rank tracker can't — and being early to it is the advantage.

How to switch from Semrush (a low-risk path)

1. Export your Semrush data first. Pull your tracked keywords, project audits, and backlink lists while you still have access — you'll want the baseline before the seat lapses. Moving to SE Ranking, its free migration does part of this for you.
2. Re-baseline your metrics. On day one, record your and your competitors' domain scores, keyword difficulty and volumes in the new scale. They won't match Semrush one-to-one; the trend is what matters.
3. Recreate your rank-tracking set. Import the same keywords so the time series stays continuous and you don't lose history at the switch.
4. Add the AI-visibility layer, on your terms. Run a first AI Share of Voice scan (or the free check) to see which engines name you versus competitors. Your suite already reports something here — the point of doing it in your own stack is that the prompt list, the raw answers and the scoring stay yours when a client asks how you got the number.
5. Don't rip everything out on day one. If your team genuinely uses Semrush's PPC or social modules, keep it for a cycle and run the SEO plus AI-visibility tool alongside, then consolidate once the new suite has proven itself.

Pick your Semrush alternative in two minutes

• Closest full replacement, budget's fine → Ahrefs.
• Only use the SEO part → the open-source route (free self-hosted, $29 managed), then Moz Pro from $49 for one site without AI features, or $99 on the plan cards.
• Agency wanting an affordable suite with easy migration → SE Ranking.
• Mainly competitor and PPC research → SpyFu.
• Best free option for your own site → GSC + Ahrefs Webmaster Tools.
• Own your data, MIT license, largest community → OpenSEO (self-host).
• Escape the price and own the measurement → RankDelta.
• You genuinely use Semrush's cross-channel breadth → stay on Semrush.

The bottom line

There isn't one "Semrush alternative" — there's the right one for your reason to leave. Breadth you'll miss → stay. Price → the open-source stack, then Moz Pro. A like-for-like swap → Ahrefs. Data ownership → the open-source stack, which is the only route that gives it to you. And if the question that keeps you up isn't only "where do I rank on Google?" but "does the AI recommend me, and can I show how I measured it?", every suite now answers the first half and none of them hands you the second. That is why we built RankDelta open-source, with AI Share of Voice included and the scoring code in the repo. The lowest-risk way to see where you stand is to run the free check — no signup — and if you need Semrush's full marketing breadth, we just told you to keep it.

The free check on rankdelta.ai — no signup, one domain, one answer.

The tracked-prompts view in RankDelta — every buying question becomes a check across the engines, batched to protect the API budget.

Go deeper

Start from what AI visibility is, then the tool split in AI visibility tools and how to track AI Overviews. Leaving Ahrefs instead? Ahrefs alternative. Weighing the three big suites head to head? SE Ranking vs Ahrefs vs Semrush. Mostly after competitor ad data? SpyFu alternative. Prefer the friendlier suite? Moz alternative. Own-your-data route: best open source SEO software. Classic-suite SERP: top 10 SEO software. Free check: /#check. Autopilot writing: /content-agent.

Sources

1. Vendor pricing pages, read 3 November 2026, monthly list prices: semrush.com/pricing (EUR), ahrefs.com/pricing (USD), moz.com/products/pro/pricing (USD, prices and the $49 starter block both there), seranking.com/pricing.html (USD), spyfu.com/pricing (USD).
2. Keyword measurement, semrush alternative, Google Ads volume via Rankdelta keyword research, US/English, 3 November 2026 — 880 searches/month, difficulty 10. The variants semrush alternatives and alternative to semrush report the same grouped volume, which is how Google Ads groups close variants.
3. First-party: rankdelta.ai Search Console, 1 August → 1 November 2026 — this URL: 57 impressions, average position 13.7, 0 clicks; the Italian mirror: 2 impressions, average position 5.5, 0 clicks.
4. Google Search Central — documentation on Search features including AI Overviews and generative-AI reporting.
5. Search consensus on "Semrush alternatives" — SpyFu, SEO.com, Traffic Think Tank, SE Ranking, SEOTesting, AlternativeTo (2026).
6. Ahrefs Webmaster Tools — free product for verified owners.

Frequently asked questions

What is the best Semrush alternative in 2026?

It depends on why you are leaving, and the reasons changed in 2026: Semrush now includes AI visibility in every plan, so that is no longer a reason to switch. For a like-for-like hosted swap, Ahrefs at $129/month. For the lowest entry price among the hosted suites, Moz Pro at $49/month for one site, which carries no AI visibility — that starts at Standard, $99/month ($79 billed annually), with 150 tracked prompts on 3 AI models. For agencies that want free data migration from Semrush, SE Ranking at $129/month. If the reason is price or data ownership, RankDelta: open-source, self-hostable, from $29/month with AI Share of Voice included.

Is there a free Semrush alternative?

No single free tool replaces Semrush, but the free layer is bigger than most people use: Google Search Console plus Ahrefs Webmaster Tools for real backlink data on your own site, and Semrush's own free plan, which now includes limited AI-visibility features. If you want a free suite you control, the open-source route is the closest: RankDelta or OpenSEO self-hosted, plus SerpBear for rank tracking, where the software costs nothing and you pay only the data APIs you call.

Which Semrush alternative also tracks AI visibility?

Most of them, as of November 2026. Semrush includes AI search tracking in every plan (custom prompts, AI sentiment, AI visibility reports, 50 prompts a day from Starter), Ahrefs Lite includes 150 AI prompt checks, Moz Standard includes 150 tracked prompts a month, SE Ranking Core includes 25 prompts a day, and SpyFu includes AI Brand Monitoring on Basic — limited, with a 3-chat ChatGPT integration — and more of it on Pro + AI. The difference that remains is ownership: RankDelta is the only one of these you can self-host, with the prompt list and the scoring code in your own repository.

Is Ahrefs better than Semrush?

They lead in different places. Semrush is broader: SEO plus paid search, social, content and market research for a whole marketing team, from $139/month on monthly billing ($117.33 billed annually). Ahrefs is preferred for backlink depth and a cleaner SEO-only workflow, and its Lite plan at $129/month includes API and MCP access plus 150 AI prompt checks. Pick Ahrefs for a like-for-like swap. If price is the reason you are leaving, neither is the answer.

Do I really need to leave Semrush?

Not if you use its breadth. PPC, social, content and its keyword database are a real moat no cheaper tool fully replaces, and AI visibility is now included rather than sold separately. The strong reasons to leave are budget, data ownership, and reporting you can audit: the cheapest hosted plan that includes AI prompts now starts at $99 a month (Moz's $49 tier has none), self-hosting keeps client prompt sets and answers on your infrastructure, and an AI Share of Voice number whose formula you can read is a different object from one you cannot.

How much does Semrush cost, and are alternatives cheaper?

On 3 November 2026 Semrush listed SEO at $139/month on monthly billing ($117.33 billed annually), Starter at $199 ($165.17 billed annually) with 50 AI prompts a day, and Pro+ at $299 ($248.17 billed annually) with 100. The hosted alternatives are not much cheaper any more: Moz Pro from $49 for one site without AI features or $99 on the plan cards, Ahrefs Lite $129, SE Ranking Core $129, and SpyFu Basic $39 where AI Brand Monitoring is limited, complete on Pro + AI at $119. RankDelta is $29/month managed, or free to self-host with your own API keys.

Can I keep Semrush and add AI-visibility tracking separately?

Yes, but check your plan first: AI visibility is now part of every Semrush plan, so you may already be paying for it. A separate tracker still makes sense when you need prompt sets that stay private, a scoring formula you can audit, or coverage on engines your suite does not include. RankDelta's free check gives a one-off read of whether AI answers name you; the tracker adds continuous AI Share of Voice across ChatGPT, Perplexity, Gemini and Google AI Overviews.