8 Best Boost Alternatives for Shopify Plus (2026)

Key Takeaways

• Boost AI Search & Discovery (formerly Boost Product Filter & Search) is a filter-first Shopify app. Deep faceted filtering is its mature core; the semantic "AI" layer is a recent addition, launched in 2023.
• Boost is now owned by AppHub, an app roll-up backed by Silversmith Capital Partners and PSG, after a June 2024 acquisition.
• Pricing scales with your GMV, from $29 to $1,499 per month across tiers, and two public price sheets disagree, so the "from $29" headline understates what a growing store pays.
• Brands leave when they want true semantic AI and enterprise merchandising, on pricing that does not scale with sales.

Boost is one of the most-installed search and filter apps on Shopify, and faceted filtering is why. Custom filter trees, metafield and variant filters, swatch menus that hold up on a huge catalog: on deep filtering, few apps come close.

That strength is also the ceiling. Boost started life as Boost Product Filter & Search, and the search and "AI" layer showed up later, rebranded to Boost AI Search & Discovery in 2023.

Filtering is the mature half. Semantic relevance and enterprise merchandising are the thinner layer resting on top.

On the onboarding calls we run with Shopify Plus brands, the same split shows up: they love the filtering and have outgrown almost everything around it.

This guide lines up the eight best Boost alternatives for Shopify Plus brands doing $10M or more, sorted by the kind of team each one suits.

Full disclosure: I founded Layers, which sits at number one below. I've kept that entry honest, including the spots where we're the wrong fit, and every line about the other seven comes from independent reviews and public pricing.

Why are brands looking for Boost alternatives in 2026?

Look closely and the reasons split five ways. Only one touches the filtering everyone praises; the other four are about what Boost wrapped around it.

1. The "AI" is a recent layer, not the core. Boost added search and semantic features to a filter engine and rebranded in 2023. Its deepest AI features sit on the top Accelerate tier.
2. Pricing scales with your GMV. Boost bills on GMV, and its two price sheets disagree: the App Store shows Accelerate at $699 while the vendor site lists $399. Aggregators report an overage above your tier.
3. Sync lag and dev-dependent edits. On large catalogs, reviewers report sync that is slow to reflect bulk changes. One merchant: "ANY CHANGE you want to make is THEME specific."
4. Reliability and SEO incidents. A merchant blamed Boost's code for de-indexing collection pages, saying it "cost us thousands of pounds," and stores report page-load failures during peak traffic.
5. Thin independent proof, no agent story. Boost's rating is essentially a single-channel Shopify signal (G2 ~30 reviews, no Capterra corpus), and there is no evidence of MCP or agent-commerce support.

Here's the fair read. Boost's filtering keeps merchants loyal for years, and for plenty of stores that's enough.

A $10M+ Plus brand competing on relevance and merchandising, against a bill it can forecast, is the exception. It ends up leaning on the parts Boost added last.

The 8 best Boost alternatives at a glance

All figures were verified as of 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: 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 Boost alternatives in depth

1. Layers

We built Layers as the only AI search and merchandising platform made exclusively for Shopify Plus. Boost grew up as a filter app and bolted AI on afterward. We started the other way round, from semantic search and native Shopify depth.

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, with no synonym lists to maintain.
• 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 multi-times-a-day 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. Filter-first and platform-agnostic tools here often sync on slower batch cycles.
• A merchandiser can change sort orders and rules without a developer or a theme edit.
• One bundled price with no GMV scaling and 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.

We're the fit when Boost's filtering still works for you but its bolt-on AI and merchandising don't. Off Shopify Plus, one of the tools below will suit you better.

2. Klevu

Klevu runs AI search, merchandising, and recommendations for roughly 3,000 brands. Independent reviewers keep landing on the same reason to buy: relevance and NLP. It now operates as a division of Athos Commerce.

Best for: Mid-market and enterprise retailers with large, multi-attribute catalogs that want a managed AI suite built for relevance from the start.

Key features:

• Self-learning AI ranking computed at the query level rather than global popularity alone.
• Hybrid keyword-plus-semantic relevance that reviewers rate as its top attribute.
• Rule-based merchandising with boosting, pinning, and scheduled campaigns.
• 30+ languages for international catalogs.

Pricing: Module-based on the Shopify App Store, which is where the cost adds up.

• Site Search $649, Category Merchandising $549, Recommendations $449, totaling $1,647/month for the full suite before overages.
• Enterprise and Athos pricing is quote-only.

Pros:

• Search relevance and NLP that reviewers call its top attribute.
• Support is the most-praised part in nearly every five-star review.
• Mature merchandising controls with auto-adjusting boost scores.

Cons:

• Premium pricing is the #1 recurring complaint, even in five-star reviews.
• Modules stack: search, merchandising, and recommendations are billed separately.
• Athos has said legacy platforms will be "gradually retired" from 2027; Klevu customers face a described migration.

Reviews:

• G2 4.4/5 (71), Capterra 5.0/5 (5), TrustRadius 7/10 (4), Shopify App Store 4.9/5 (~12).
• Scores are good, but samples outside G2 are thin, and price and dev dependency recur even in the five-star reviews.

If you can absorb the module pricing, Klevu lifts relevance well past a filter-first app, Athos 2027 clock and all. The Klevu comparison has the Shopify specifics.

3. Algolia

Algolia is a hosted, developer-first search API that pairs keyword and vector search with optional AI relevance. It's been at this since 2012. Today it serves 18,000+ businesses and fields 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 semantic results.
• NeuralSearch is gated to the top Elevate plan, and the Merchandising Studio UI is absent on the entry Grow plan.

Pricing: Usage-based, and this is where buyers get surprised. 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, and that upper tier is 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 deepest 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 fit 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: the responsive kind "requires... min $12,000 USD a year," with pay-as-you-go tickets unanswered for 20+ days.

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.

Do your engineers want to own the storefront and stomach a usage bill? Then Algolia rewards them. Merchandising teams without developers get much less, and the Algolia breakdown weighs both.

4. Searchspring

Searchspring is a mature site search, merchandising, and personalization platform, prized for years for handing merchandisers control of results without a developer in the loop. It now sits under Athos Commerce, the same parent as Klevu.

Best for: Merchandiser-led teams that want granular, no-code control of search and category pages, on Shopify or several other platforms.

Key features:

• Visual, no-code merchandising: pinning, boosting, burying, and up to 15 custom sort orders per collection.
• IntelliSuggest behavioral ranking plus newer semantic query parsing.
• Segmented and geo merchandising, A/B testing, and campaign scheduling.
• Runs across Shopify, BigCommerce, Adobe Commerce, and Salesforce Commerce Cloud.

Pricing: Quote-only, with directory listings as the only public anchor.

• Directory listings cite starting tiers around Essential $699, Advanced $899, and Expert $1,099, usage-based floors that climb with catalog and traffic.
• One merchant reports paying "2K a month"; contracts are annual and auto-renewing, with onboarding billed separately.

Pros:

• Merchandiser control is the most-praised capability, cited as a step-change over native search.
• High independent review scores and Gartner recognition.
• Measurable conversion and AOV lift reported by merchants (one cites +20% AOV).

Cons:

• 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.
• The same 2027 sunset applies: Searchspring is a legacy platform inside Athos, on a described upgrade path.

Reviews:

• G2 4.6/5 (142), TrustRadius 9.0/10 (14), Gartner Peer Insights 5.0/5 (7), Shopify App Store 4.5/5 (21).
• Its Shopify and G2 listings already read "Athos Commerce," which is itself a signal.

Fifteen custom sort orders per collection buys real control; a 3-to-6-week support queue and a 2027 migration are what it costs. Weigh that against your roadmap in our Searchspring writeup.

5. Nosto

Nosto is a Commerce Experience Platform built first on AI personalization and recommendations, with a search module stitched together from acquisitions (Findologic and SearchNode). It stays privately held and independent.

Best for: Brands whose primary need is personalization and recommendations, with search as a secondary requirement.

Key features:

• 1:1 personalization and product recommendations, its most-praised area.
• Merchandising with weighted multi-metric ranking.
• A search product that added Hybrid Vector Search, sold as a separate module.
• A late-2025 agentic layer, Huginn, with an MCP server.

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 deepest personalization and recommendations on this list.
• Hands-on CSM support that reviewers name individually.
• Merchandising holds up 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.

Nosto is for personalization-first brands that treat search as a bonus. When search is the whole reason you're leaving Boost, Layers vs Nosto argues for a specialist instead.

6. Fast Simon

Fast Simon, once called InstantSearch+, is a search, merchandising, and personalization app that runs on Shopify, Wix, and BigCommerce.

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

Key features:

• AI and visual (multimodal) search, merchandising rules, collections, and personalization.
• Realtime catalog sync on higher tiers.
• The AI multimodal search and merchandising rules both sit on the top Top Pro 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 large, mostly happy Shopify review base.

Cons:

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

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

Mid-market stores get their money's worth. Push real traffic through it and the session meter, along with a depth ceiling on language understanding, starts to bite, which the Fast Simon rundown walks through.

7. Doofinder

Doofinder is a multi-platform site search tool built for SMB and mid-market, and one of the rare vendors here that puts its pricing in public.

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

Key features:

• Site search and autocomplete with typo and synonym handling.
• Merchandising banners and a growing AI layer on a keyword core.
• Runs across Shopify, WooCommerce, Adobe Commerce, and more.

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

• Basic $49 (10K requests), Pro $149 (150K), Advanced $349 (400K), Enterprise custom.
• The Shopify App Store lists higher numbers ($61/$186/$436), and with no overage packs, passing a request 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.
• Fast, low-code setup and good value for SMB.
• Broad platform and language support (30+ languages).

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).
• Trustpilot is cooler at 3.8/5 (507), where billing and support complaints concentrate.

Small catalog, and the published pricing and quick setup are a genuine draw. At $10M+, you outgrow the request caps and start wanting merchandising it can't reach. We put numbers to both in Layers vs Doofinder.

8. Constructor.io

Constructor.io is an enterprise, AI-native product discovery platform that ranks results to a business objective like revenue or margin. Where keyword engines optimize for text match, it optimizes for the sale. It raised a $25M Series B in 2024 at a $550M valuation.

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).
• 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, and its Shopify Connect app 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 the six-figure ticket for a large retailer optimizing to revenue and staffed to run it. For most mid-market Plus brands, it's more engine than the catalog will ever use. The full picture sits in the Constructor.io comparison.

How to choose the right Boost alternative

The right pick falls out of two things: who runs search on your team, and which platform you're on.

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

One trap sits above all of these: swapping a GMV-scaled or migration-bound tool for another one just relocates the problem.

If forecastable pricing and independence are what pushed you off Boost, hold Klevu and Searchspring up against their shared Athos 2027 timeline before you sign anything.

FAQs

Is Boost Commerce being discontinued? No. It's actively developed and still one of the most-installed search apps on Shopify. In June 2024 it was acquired by AppHub, a roll-up backed by Silversmith Capital Partners and PSG.

How much does Boost cost? It bills against your monthly GMV. The Shopify App Store lists Launch $29, Convert $299, and Accelerate $699, and each climbs as GMV grows. Boost's own site quotes lower numbers in places, so confirm your tier with the vendor.

Is Boost the same as Boosted Commerce? No. Boost Commerce builds the Shopify search and filter app covered here. Boosted Commerce is a separate, California-based Amazon aggregator with no connection to it. The names rhyme; the companies don't overlap.

Does Boost do semantic AI search? It does, up to a point. Boost added a semantic and AI layer in 2023 to an engine built first for filtering. Independent analysis reads it as relevance features layered on the filter engine, with the deepest AI reserved for the top Accelerate tier.

What is the best Boost alternative for a Shopify Plus brand? It comes down to your team. For native Shopify depth a merchandiser can run without developers, that's what we built Layers to do. For managed AI search, Klevu; for headless builds, Algolia; for personalization, Nosto.

Which Boost alternative is the cheapest? Of the tools that publish pricing, Doofinder ($49/mo) and Fast Simon (free tier, then $39.99/mo) start lowest. Both meter usage, though, so that entry price rises with your traffic.

If Boost's filtering still does its job but the thin AI, the shallow merchandising, or the GMV-scaled bill keeps pulling your attention, trust that.

Before you switch, pull two numbers: your null-result rate and your revenue per search session. Then demo two or three of these on your own catalog.

Whichever one moves conversion on your products is the one to buy.

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