8 Best Klevu Alternatives for Shopify Plus (2026)

Key Takeaways

• Klevu is now a division of Athos Commerce, formed when Searchspring and Klevu combined in January 2025.
• Athos has said its legacy platforms will be "gradually retired" from 2027. Klevu customers get a "migration path"; sibling Searchspring gets a lighter "upgrade path."
• That roadmap change, not any gap in search quality, is why brands are shopping around.
• Klevu's published Shopify pricing stacks to $1,647/month for the full suite: $649 search + $549 merchandising + $449 recommendations, before overages. Several alternatives cost less.

Klevu builds good ecommerce search. Reviewers rank search relevance and NLP as its strongest attribute, and its support earns praise in nearly every five-star review.

The reason teams are shopping around is corporate, not technical.

In January 2025, Searchspring (a PSG portfolio company) combined with Klevu and, with the product-feed vendor Intelligent Reach, rebranded as Athos Commerce. Klevu's standalone roadmap ended.

On the onboarding calls we run with Shopify Plus brands, that migration is now the first thing teams raise, ahead of any complaint about search.

This guide compares the eight best Klevu alternatives for Shopify Plus brands doing $10M or more, organized by the kind of team each one fits.

One disclosure: I founded Layers, one of the tools here. I have kept our entry honest, including where we are the wrong choice. Every claim about the others comes from independent reviews and public pricing.

Why are brands looking for Klevu alternatives in 2026?

Four forces are pushing Klevu customers to look, and only one is about search quality.

1. A forced migration with a 2027 sunset. Athos Commerce's August 2025 rollout notice set Q1 2026 for the new platform and said legacy platforms retire from 2027. Klevu customers get a "migration path," a heavier lift than Searchspring's "upgrade path."
2. Reduced negotiating room. Klevu and Searchspring are now the same vendor. Shortlisting both means comparing two products from one company before you have asked for a price.
3. Module pricing that stacks. Klevu prices search, merchandising, and recommendations as three separate modules totaling $1,647/month, before overages and AI Agents add-ons. Even five-star reviews name price as the recurring gripe.
4. Developer dependency and opaque pricing. One TrustRadius reviewer: "you definitely need someone technical in house." Enterprise pricing is quote-only.

None of this makes Klevu a bad product. The ground under it is moving, and that is reason enough to look at your options.

The 8 best Klevu alternatives at a glance

All figures were verified in August 2026. Vendors change pricing and ownership often, so confirm on each vendor's site before you buy.

How we picked these alternatives

We scored each tool the way a Shopify Plus merchandiser buys, on five things:

• Native Shopify depth: metafields, combined listings, and Markets support.
• Merchandiser independence: can your team run it without a developer?
• Pricing: how transparent and predictable is the bill?
• Independent sentiment: real third-party reviews, not vendor testimonials.
• Company stability: who owns it, and where is it headed?

Every pro and con below is third-party sourced (G2, Capterra, TrustRadius, Trustpilot, Shopify App Store, forums). Vendor pages only confirm a feature exists or quote official pricing.

The 8 best Klevu alternatives in depth

1. Layers

We built Layers as the only AI search and merchandising platform made exclusively for Shopify Plus. That focus is the whole point: every part of the platform assumes Shopify, instead of being one connector among many.

Four products, one bundle: AI Search, Merchandising, Visual Discovery, and Product Recommendations.

Best for: Shopify Plus brands at $10M or more that want native Shopify depth and a tool their merchandising team runs without developer tickets.

Key features:

• Semantic search across 100+ languages in a single index.
• Ranking that blends business metrics like margin and return rate into one sort score.
• Near real-time webhook catalog sync: a price or inventory change in Shopify is searchable almost immediately, not on a nightly or ten-minute batch.
• Native metafields, combined listings, B2B catalogs, and Shopify Markets.
• An MCP server so AI assistants can query your catalog directly.

Pricing: Usage-based, quoted on your last 12 months of collection page views plus total search requests.

• All four products bundled into one price.
• No overage charges as traffic grows, and you can lock your rate for up to a year.
• Priced up to 40% below legacy platforms. There is no public per-tier number, so you get a quote.

Pros:

• One search index across every Shopify Market, updated in near real time. Several tools here run a separate index per market and sync on slower batch cycles.
• A merchandiser can change sort orders and rules without a developer.
• One bundled price: no module stacking, no usage overages.
• David Cost, VP of eCommerce at Rainbow Shops, said Layers "was the first time we were able to create the kind of sort orders we were used to having in Salesforce," with "a pretty immediate impact on conversion rate."

Cons:

• Shopify Plus only. On Magento, BigCommerce, or Salesforce Commerce Cloud, we are not your tool.
• We are newer and smaller than the incumbents here, so our independent review volume is thinner.
• We do not do email or marketing personalization. Search and merchandising is a big enough problem to own fully.

Reviews: As a newer platform, our review count is smaller than the incumbents'. Rather than quote a thin sample, we point buyers to verifiable customer stories.

If you are on Shopify Plus, this is the tool built for your exact stack: native depth, merchandiser-owned control, near-real-time sync, no migration overhang. If you are not on Shopify Plus, one of the tools below will fit you better.

2. Algolia

A hosted, developer-first search API that combines keyword and vector search with optional AI relevance. Founded in 2012, it serves 18,000+ businesses and handles roughly 1.75 trillion searches a year.

Best for: Engineering-led teams and headless Shopify Plus builds comfortable owning the front end.

Key features:

• Fast keyword search with typo tolerance TrustRadius scores ~9.2/10.
• A configurable ranking formula, plus NeuralSearch for true semantic results.
• But NeuralSearch is gated to the top Elevate tier, and the Merchandising Studio UI is absent on the entry Grow plan.

Pricing: Usage-based, and this is where buyers get surprised. There is a free Build tier, then billing on two axes at once: search requests and records.

• Grow charges $0.50 per 1,000 extra searches; Grow Plus jumps to $1.75 per 1,000, 3.5x the rate, and that is the tier where the AI turns on.
• Search-as-you-type can fire a billable request per keystroke, and scraper traffic is billable too, so bills are hard to forecast.
• Enterprise (Elevate) is custom and annual.

Pros:

• The strongest developer experience and documentation on this list.
• Fast, with typo tolerance reviewers rate near the top.
• Semantic and behavioral AI (NeuralSearch, Dynamic Re-Ranking), on the top tier.
• A documented sweet spot for composable, headless Shopify Plus builds.

Cons:

• Pricing unpredictability is the top complaint. One developer: "It's basically impossible for me to know whether... Algolia will cost $100/month or $1,000/month or $10,000/month."
• It needs developers. A merchant noted the app "does not provide a frontend framework... your developer team will need to implement" the storefront.
• Support is gated behind spend: real help "requires... min $12,000 USD a year," with pay-as-you-go tickets unanswered for 20+ days.
• The AI you probably want is an upgrade away.

Reviews:

• G2 ~4.5/5 (450+), Capterra 4.7/5 (74), TrustRadius 4.4/5 (134).
• On the Shopify App Store it drops to 3.5/5 across 35 reviews, split 63% five-star and 29% one-star. That gap tracks happy enterprise accounts against under-supported self-serve ones.

If you have developers who want control and can stomach usage-based billing, few engines match it. If your merchandising team wants to own search without engineering, look elsewhere. We compare the two in Layers vs Algolia.

3. Constructor.io

An enterprise, AI-native product discovery platform that ranks results to a business objective (revenue, conversion, margin) rather than keyword relevance alone. It raised a $25M Series B in June 2024, tripling its valuation to $550M.

Best for: High-traffic enterprise retailers that want search tuned to revenue and have the team to support it.

Key features:

• Dual keyword-plus-vector retrieval.
• An ML ranking model that retrains several times a day.
• Personalization with quizzes, plus its own generative AI Shopping Agent.

Pricing: Enterprise, quote-only, with no free tier and no self-service onboarding.

• Vendr puts the average contract around $150,000/year, with a redline near $200,000.
• This is a five-to-six-figure annual commitment.

Pros:

• Ranking to a revenue target sets it apart from keyword-first engines.
• The highest support score of any tool here (Gartner Service & Support 4.9), with reviewers praising the CSM relationship.
• Deep personalization, plus quizzes for guided discovery.

Cons:

• Enterprise cost and opaque pricing; you negotiate blind.
• Implementation is time-heavy. A Gartner reviewer called it "time-heavy but support was provided."
• The algorithm can limit a merchant's ability to override results.
• Overkill for mid-market. Its models need heavy traffic to pay off, and its Shopify Connect app still had zero App Store reviews as of mid-2026.

Reviews: Gartner Peer Insights 4.9/5 (59, a 2025 Customers' Choice), G2 4.8/5 (~57), TrustRadius 7.7/10 (4). Scores are high but the sample is thin and skews enterprise.

Worth it if you are a large retailer optimizing for revenue and can fund a six-figure contract plus a technical rollout. Too much tool, and too much cost, for most mid-market Shopify Plus brands.

Our Layers vs Constructor.io page has the Shopify-specific detail.

4. Searchspring

A mature site search, merchandising, and personalization platform for ecommerce. The caveat: Searchspring is now the other half of Athos Commerce, the same parent as Klevu.

Best for: Teams already invested in Searchspring. As a Klevu alternative, weigh the shared-parent problem carefully.

Key features:

• IntelliSuggest search and recommendations.
• Rule-based merchandising and personalization.
• Runs across Shopify, BigCommerce, and other platforms.

Pricing: Quote-only.

• Directory listings cite starting tiers around Essential $699/mo, Advanced $899/mo, and Expert $1,099/mo, and one merchant reports paying "2K a month."
• Treat these as a floor; implementation is billed separately.

Pros:

• High independent review scores and Gartner recognition.
• Solid merchandising and recommendations for broad ecommerce.

Cons:

• The same 2027 sunset applies here. Escaping Klevu's migration by moving to Searchspring just lands you on the same clock.
• Post-merger support is the loudest recent complaint, with reviewers reporting 3-to-6-week helpdesk waits at peak.
• Annual auto-renewing contracts with weak exit clauses come up repeatedly.
• Rule-based personalization has a ceiling below AI-native rivals.

Reviews: G2 4.6/5 (142), TrustRadius 9.0/10 (14), Gartner Peer Insights 5.0/5 (7). Its Shopify and G2 listings are already rebranding to "Athos Commerce," which is itself a signal.

A capable product, but as a Klevu alternative it is a lateral move inside the same portfolio, facing the same roadmap change. Compelling only if you specifically want Searchspring's merchandising and accept the shared-parent reality. See Layers vs Searchspring for the detail.

5. Nosto

A Commerce Experience Platform whose mature core is AI personalization and recommendations, with a built-in CDP, onsite content, and a search module assembled from acquisitions (Findologic and SearchNode). Note: Nosto did not acquire Findify; that was a separate company bought by Maropost.

Best for: Brands whose primary need is personalization and recommendations, not dedicated search.

Key features:

• 1:1 personalization and product recommendations.
• Merchandising with weighted multi-metric ranking.
• A search product that added Hybrid Vector Search.
• In late 2025 it added an agentic layer, Huginn, with an MCP server, a real agent-readiness signal.

Pricing: Quote-only and indexed to your revenue, so cost scales with GMV.

• Vendr lists an average contract around $47,591, on annual terms.
• Third-party guides cite roughly $500/month at entry, scaling to $500 to $5,000/month for mid-market.

Pros:

• The strongest personalization and recommendations on this list, its most-praised area.
• Hands-on CSM support that reviewers name individually.
• Merchandising holds up here too, alongside the personalization.

Cons:

• Cost scales with revenue, which gets expensive as you grow.
• Annual lock-in and billing after cancellation are the most-cited complaints. One merchant: "you sign a year contract... and they force you to keep the expensive contract even when the services do not help."
• Search is a separately sold module, and there is no shopper-facing image search.

Reviews: G2 4.6/5 (235), Shopify App Store 4.8/5 (~60). The one-star tail clusters on contract and billing friction.

If personalization is your priority and search is secondary, Nosto is a top pick. If search is the reason you are leaving Klevu, a pure-play search tool will serve you better, as we cover in Layers vs Nosto.

6. Fast Simon

A search, merchandising, and personalization app for Shopify, Wix, and BigCommerce, formerly known as InstantSearch+.

Best for: Mid-market and SMB stores that want fast setup and visual search without an enterprise contract.

Key features:

• AI and visual search, merchandising rules, collections, and personalization.
• The AI multimodal search and the merchandising rules both sit on the top tier.

Pricing: Session-metered, not GMV-based.

• Published Shopify tiers run Free, Starter $39.99, Essential $99.99, and Top Pro $299.99 (30,000 sessions), with enterprise quote-based above that.
• Two gotchas: bot traffic consumes billable sessions, and reviewers report mid-cycle price increases.

Pros:

• Easy setup and responsive support, its most-praised traits.
• Visual and AI search at an accessible price.
• A big, mostly happy Shopify review base.

Cons:

• Reliability and indexing bugs surface in reviews ("products/images not showing").
• Fixes are sometimes gated behind pricier tiers (G2 scores support 7.1).
• NLP and language understanding are weaker than the merchandising side.
• Session-metered billing is a risk for exactly the high-traffic brands it markets to.

Reviews: Shopify App Store 4.8/5 (289), where sentiment is strongly positive, versus G2 4.0/5 (13), where a thin sample concentrates the criticism.

Mid-market stores get their money's worth here. Brands with large catalogs and high traffic tend to outgrow the session-metered model and the depth ceiling, which we detail in Layers vs Fast Simon.

7. Boost AI Search & Discovery

A Shopify-native filter, search, and merchandising app (formerly Boost Product Filter & Search), now owned by the app roll-up AppHub. Its historic strength is deep faceted filtering.

Best for: Shopify stores with large, attribute-rich catalogs that need powerful filtering at a low entry price.

Key features:

• Advanced product filtering, its core strength.
• Search, merchandising, and recommendations.
• A recent "AI" layer added on top.

Pricing: GMV-scaled tiers on the Shopify App Store.

• Launch $29, Convert $299, and Accelerate $699, rising to $1,499 as GMV grows.
• Its own site shows lower numbers in places, so confirm your tier directly.

Pros:

• Deep faceted filtering, its strongest feature by far.
• Shopify-native, and cheap to start.
• One of the largest review bases of any app here.

Cons:

• The "AI" and semantic layer is a shallow, recent addition on top of a filter-first engine.
• Reviewers report sync lag on large catalogs and an SEO indexing bug that de-indexed collection pages ("cost us thousands of pounds").
• Theme changes often need a developer or support.
• Independent validation beyond Shopify is thin (G2 ~30 reviews, no Capterra corpus).

Reviews: Shopify App Store 4.7/5 (~1,497, 94% five-star), with a small but real one-star tail on sync and billing. G2 4.8/5 on a much smaller sample.

Hard to beat for filtering on a budget. If you are leaving Klevu for stronger semantic AI and enterprise merchandising, it is a step sideways on capability. We compare the two in Layers vs Boost.

8. Doofinder

A multi-platform site search tool aimed at SMB and mid-market, and one of the few vendors here that publishes its pricing.

Best for: Smaller and mid-size catalogs that want search up fast with a price you can read before you buy.

Key features:

• Site search and autocomplete.
• Merchandising banners and a growing AI layer.
• Runs across many ecommerce platforms.

Pricing: Published, query-based, and readable before you ever talk to sales.

• Basic $49/mo (10K requests), Pro $149 (150K), Advanced $349 (400K), Enterprise custom.
• The Shopify App Store lists higher numbers ($61/$186/$436), and there are no overage packs, so passing a query cap forces you to the next tier.
• One Trustpilot reviewer reported a 496% jump (25 to 149 euros) when usage crossed a threshold.

Pros:

• Transparent, published pricing, a rarity in this category.
• Easy setup and good value for SMB.
• Broad platform support.

Cons:

• Query-cap "bill shock" is the signature complaint.
• Support quality decays after onboarding.
• Catalog sync can lag around 24 hours, a gap for flash sales.
• It is not built for $10M+ Plus. There is no Built-for-Shopify badge, and it runs as a platform-agnostic overlay.

Reviews: G2 4.7/5 (476), Shopify App Store 4.7/5 (~741), Capterra 4.8/5 (29). Note Trustpilot is cooler at 3.8/5 (507), where billing and support complaints concentrate.

For smaller catalogs, the transparent pricing and fast setup are the draw. Large Shopify Plus brands tend to outgrow the query caps and want deeper merchandising, the case we make in Layers vs Doofinder.

How to choose the right Klevu alternative

Start from your team and your stack, then find the tool that fits.

• If you are on Shopify Plus: you want native depth (metafields, combined listings, Markets) and a tool your merchandising team runs without developers. That is exactly what we built Layers for. Put us in a demo against Klevu on your own catalog, or read the full Layers vs Klevu breakdown.
• If you have developers and a headless stack: Algolia gives you the most control, if you can manage usage-based cost.
• If you are a large enterprise optimizing for revenue: Constructor.io is built for that, if you can fund it.
• If personalization is your priority: Nosto leads there, with search as a secondary strength.
• If budget and speed matter most: Fast Simon, Boost, or Doofinder get you live quickly, with the tradeoffs each entry spells out.

The one move to avoid is swapping Klevu for Searchspring without eyes open. They are the same company now, on the same 2027 timeline.

FAQs

Is Klevu being discontinued? Not immediately, but its standalone roadmap has ended. Klevu is now a division of Athos Commerce, which has said legacy platforms will be "gradually retired" from 2027, with Klevu customers offered a "migration path" to a new unified platform.

How much does Klevu cost? On the Shopify App Store, Klevu prices three modules separately: Site Search $649/mo, Category Merchandising $549/mo, and Recommendations $449/mo. That is $1,647/month for the full suite before overages. Enterprise pricing is quote-only.

Is Searchspring the same as Klevu now? At the parent-company level, effectively yes. Searchspring and Klevu combined under Athos Commerce in January 2025. They are still sold as separate products, but they share one owner and one roadmap.

What is the best Klevu alternative for a Shopify Plus brand? It depends on your team. For native Shopify depth a merchandiser can run without developers, we built Layers for that. For headless builds, Algolia. For enterprise revenue optimization, Constructor.io. For personalization, Nosto.

Which Klevu alternative is the cheapest? Among tools with published pricing, Doofinder ($49/mo) and Fast Simon (free tier, then $39.99/mo) have the lowest entry points. Both have caps and tradeoffs that matter as you scale.

If the Athos migration is what has you re-evaluating search, that instinct is sound.

Pull your current null-result rate and revenue per search session first. Then demo two or three of these against your real catalog. The tool that moves conversion on your products is the one worth switching to.

For a deeper framework, see our guide to the best AI search for Shopify Plus.