The best retargeting platforms for small businesses in 2026

Google now calls remarketing lists 'your data' segments, and for most small businesses they are the first place to retarget. The Google tag on your site adds visitors to a segment, and you can show ads to that segment on the Display Network, in Search and on YouTube. Google says the segments reach people 'as they browse over 2 million websites and mobile apps', and its help page states 'There's no extra cost to use Google's auction.'

The bar to start is low. A segment needs 100 active users in the last 30 days to serve on Display or Search, and YouTube uses the same 100, according to Google's audience size page. Website segments keep people for 30 days by default and up to 540 days. A new segment can take 48 to 72 hours to populate.

Three limits catch small accounts. In Performance Max and other optimized-targeting campaigns, your audience becomes a signal for Google's system rather than a fence, so ads can reach people who never visited. Each campaign or ad group holds one audience at a time, though one audience can hold several segments. And businesses in Google's sensitive interest categories, which include health and negative financial status, can't use advertiser-curated audiences at all.

Meta's version is the website custom audience: the Meta Pixel records visits, and the audience is built from them. Meta can also build custom audiences from app activity, catalog activity, customer lists, offline activity and engagement on its own apps. Meta's help pages list no fee for the Pixel or for audiences; you pay for the ads.

Meta doesn't publish a hard minimum. Its help center advises 'waiting until you have several hundred people in your website custom audience before using it.' Expect the count to sit well below your traffic, because Meta counts unique, matched people, leaves out accounts that opted out of online behavioral advertising, and says some iOS 14 users may be missing. On budget, Meta publishes no single minimum, and Ads Manager warns you when you're under it.

Two details are unresolved on Meta's own pages, so check them in Ads Manager. Its developer doc gives a retention range of 1 to 180 days while the same page's FAQ says 365, and its pages disagree on whether a new audience includes visits from before you created it, so create the audience as soon as the Pixel is live. Ads for housing, employment and financial products lose several targeting options, including exclusions and lookalikes, and Meta says the names and criteria of your audiences must not reflect health or financial information.

If you want retargeting beyond Google's and Meta's own tools, AdRoll states the lowest entry point of the third-party tools in this list. Its pricing page describes self-service as 'Pay-as-you-go advertising', with cross-channel attribution and social ads as add-ons. Campaigns run on the open web, and the social add-on reaches Facebook, Instagram, TikTok and Pinterest. Its help center says AdRoll 'does not have any minimum spend to launch a campaign', and its budget article sets a $2.50 minimum daily budget per campaign. Connected-TV campaigns are the exception: the recommended self-service minimum is $165 a day per campaign.

The pricing page shows no dollar price for any package. Its FAQ says AdRoll 'offers dynamic pricing based on CPM (cost per thousand impressions), which means the cost can vary depending on demand'. The low floor is not the whole picture: AdRoll's budget help page suggests starting at $1,000 to $2,000 a month for a 10,000-person audience, $2,500 to $5,000 for 25,000, and $5,000 to $10,000 for 50,000. On G2, AdRoll averaged 4.1 out of 5 across 805 reviews on October 23, 2026. G2 marks every review quoted here as incentivized. A small-business reviewer praised the dashboard (quoted below), and an agency reviewer said clients found 'the cost is a bit higher than expected'.

Trustpilot tells a different story: 1.8 across 187 reviews on the same day. A September 2025 reviewer wrote: 'Since June 2025, AdRoll has been a nonstop cycle of errors, broken processes, zero delivery, and ineffective support.' Another, in October 2026, wrote: 'The self-service product stinks.' A fair test is one campaign at a small daily budget aimed at the same visitors you already reach on Meta, then compare the results before adding channels.

Microsoft Advertising runs remarketing through its UET tag (Universal Event Tracking), which has to go on every page of your site, so you need to be able to edit the site's code. Microsoft's API documentation says a list needs at least 300 people before Microsoft will use it for optimizations, and a list can keep people for 1 to 180 days.

It makes most sense if you already run Microsoft search ads and want to follow up those visitors. The sensitive-category rules show up here too: for financial, insurance, education, employment and housing services, you can't use demographics such as age, gender or location to personalize or segment ads. Visitors from the EEA, the UK and Switzerland need Consent Mode or TCF consent signals passed with the tag.

Several basics we could not confirm. The 300 figure comes from API docs about optimization, not a help-center serving threshold. The FAQ answers on the help page were collapsed and unreadable to us, and we found no minimum budget.

TikTok builds website-traffic audiences from the TikTok Pixel, and you must define the event you want to track, so an audience can be people who took a particular step rather than every visitor. TikTok's help article, dated February 2025, says 'You need a minimum audience size of 1,000 to target Custom Audiences in an ad group.'

Budget floors are the other hurdle. TikTok's budget article, updated July 2026, says a campaign budget must exceed $50 and an ad group budget must exceed $20. At just over $20 a day, an ad group spends more than $600 over 30 days, which is a lot of impressions for a small list. TikTok fits once your site produces an audience of 1,000 and you have video ads to show them.

LinkedIn's website retargeting uses the Insight Tag, which must be live on your site. A segment needs at least 300 people before it can be used in a campaign, and LinkedIn's help page adds: 'we suggest a minimum of 50,000 to drive results.' The 300 counts LinkedIn member accounts, not visits, so a small site can take a while to get there.

Minimum spend is published: $10 a day for any ad format, or $100 lifetime for a new campaign. That is about $300 over a 30-day month even if your list is small. LinkedIn also says Matched Audiences may be smaller in the EEA and Switzerland. We did not check whether the $10 floor works differently for retargeting campaigns; LinkedIn's page says it covers any ad format.

StackAdapt is a DSP, or demand-side platform: software for buying ads across many sites and apps through automated auctions. It is well rated on G2, at 4.7 out of 5 across 905 reviews on October 23, 2026, though the reviewers lean toward agencies and mid-market companies. Its plans page says StackAdapt has no minimum advertising spend.

Getting in involves an application. Self-serve access 'is subject to an application and approval process'. The plans page lists a Basic plan with a Sign Up button and describes it as for 'Independent marketers and lean organizations with programmatic experience', although its FAQ says 'you don't need programmatic experience to run campaigns' and mentions onboarding support, forecasting tools and built-in AI recommendations. StackAdapt also says it has no hidden tech fees. No plan prices are published. The page notes that 'Most DSPs charge a percentage of media spend as a platform fee' and that campaigns 'perform best when they have enough budget to generate meaningful scale', without giving a number. For a first retargeting campaign, Google or Meta is the simpler start.

Criteo's dynamic retargeting shows visitors personalized ads across the web and social, built from your product feed (product ID, title, price, image). If you don't have a feed, its page says you can start with responsive ads and add a catalog later. For a shop with a large catalog, ads built from the products themselves are the main draw.

The page offers Contact Sales and shows no price, sign-up or minimum, so treat Criteo as a sales-led product. On G2, 'Criteo Commerce Growth' averaged 3.8 out of 5 across 242 reviews on October 23, 2026. Its Trustpilot score is 2.6 across 38 reviews. The reviews we could see mix praise with complaints about scams, counterfeit ads and an AI feature that one reviewer says enrolled their account automatically and billed them.

ReTargeter is a dedicated retargeting company. You place its pixel on your site, it drops an anonymous cookie on visitors, and it shows them ads as they browse elsewhere. Its site publishes no price.

Third-party roundups disagree on what it costs. Guideflow (July 2026), citing G2, says it starts 'at $500 per month for 10,000 monthly unique visitors, including up to 175,000 impressions'. SevenAtoms (January 2026) says 'services start at $1,500 a month.' Guideflow also reports a G2 rating of 1.3 out of 5; G2 blocked our own check. Either price is above what a small list can use: in the example above, $86 a month covered a 1,200-person list, and Google and Meta list no software fee.