Retention vs Opensend

Last updated September 2026. Competitor information verified September 2026.

What's the difference between Retention.com and Opensend?

Both tools identify anonymous website visitors and turn them into contacts you can market to. Both sell ecommerce brands the same two things: abandonment recovery and list growth.

The difference is what you're buying. Retention.com sells verified identity data. You own it and can send it anywhere in your stack. Opensend sells visitor identification that works inside your marketing tools.

The two tools also find almost entirely different people. Opensend resolves visitors against one source: its own graph, built from data collected on its partner sites. Retention.com resolves against its own graph of opted-in US records plus independent identity networks.

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Retention.com vs Opensend: platform comparison

Opensend charges per identity and serves DTC ecommerce. Retention.com charges a flat fee and serves six industries. The two are level on integrations, contract terms, and several product features.

Retention.com figures from retention.com. Opensend product, pricing, and rate information verified against Opensend's public site in September 2026. "Not published" and "Not documented publicly" mean Opensend's public materials described no such figure or capability as of that date.

What is Opensend?

Opensend is a visitor identification platform for DTC ecommerce brands. It identifies anonymous website visitors and activates them across email, SMS, paid ads, and direct mail.

Opensend's products:

• Connect, a list growth tool. It identifies anonymous visitors and syncs them to an email platform.

• Reconnect, an abandonment recovery tool for cross-device traffic. Launched in 2025.

• Ignite, a customer data improvement tool.

• Personas, an AI segmentation feature. It builds audiences for Google, Meta, and Klaviyo.

Its identity graph is built from partner sites where users consented to partner marketing. Reviewers rate the product well. One lifecycle marketer on G2 called it "the best option on the market for resolving unknown website identities and extending the cookies for abandon flows."

Opensend's published pricing starts at $400/month for 2,000 identities and reaches $1,600/month for 9,500. Enterprise pricing needs a private quote. It sells month to month with credit rollover, offers a 20% discount for annual billing, and runs a $1 trial for 14 days. Its entry tier is sized for brands with 10K–50K monthly visitors.

What is Retention.com?

Retention.com is a person-level identity data platform used by 5,500+ businesses. It resolves anonymous visitors into verified people and delivers those records into any marketing or data system.

It holds 250M+ verified US identities with 600+ attributes per match. Every email address carries its opt-in source and opt-in timestamp. Retention.com is SOC 2 Type II certified and an official Klaviyo marketplace and Mailchimp partner.

Retention.com's products for ecommerce:

• A list growth tool. It captures net-new contacts from anonymous traffic and sends them to your marketing tool.

• An abandonment recovery tool. It captures browse, cart, and checkout events other tools miss, including cross-device traffic, cleared cookies, and logged-out sessions.

• An audience expansion tool. It finds visitors the Meta pixel missed so you can retarget them.

• An email reactivation tool. It finds dormant contacts who still open and click so you can safely bring them back.

Delivery runs through email and CDP integrations, identity resolution APIs, or flat file delivery. Beyond ecommerce, Retention.com serves retailers, publishers, adtech companies, platforms, and data companies.

Why do identification rates differ so much between vendors?

Because vendors measure at different points in the same process. Turning an anonymous visitor into a contact you can email takes several steps. Each vendor picks a different step to quote.

Rates also depend on the traffic. A brand with mostly US mobile traffic and a big subscriber file resolves very differently from a brand with international desktop traffic and a small file. Any percentage quoted without your own traffic behind it is the vendor's best case.

What do Opensend's published rates measure?

Opensend doesn't say. It reports identifying 25% to 35% of anonymous visitors and a 73% match rate on US shoppers. It doesn't publish what happens between resolving an address and delivering it. Are identities qualified before they're sent? What gets filtered out, and why?

A G2 reviewer asked in July 2026: "More transparency into how the email addresses are captured and matched would be good."

What does Retention.com's 70–90% match rate measure?

It measures step one: resolving US traffic to a hashed identifier. It is the biggest number Retention.com could quote. It is not the number that matters. Four filters sit between it and your email platform.

• Collection rules. The visitor has to clear a threshold you set, such as page views or seconds on page. Below it, no resolution is attempted.

• A delay before resolving. The visitor gets time to subscribe through your own popup or form. If they do, Retention.com does not claim them.

• Daily suppression. The address is checked against your current file every day. Anyone who subscribed or purchased is removed.

• A quality chain. Before the address is passed on, Retention.com checks whether it is live, whether it is a spam trap, how recently that person engaged with email anywhere, and whether Retention.com recently passed the same person to another brand.

That last check matters more than it sounds. A shopper handed to three other brands last week is not a high-intent lead for the fourth.

Retention.com vs Opensend: what did a head-to-head test show?

One brand ran both tools on the same traffic for three weeks. Retention.com produced 2.4 times the revenue and 2.3 times the orders on 23% fewer emails.

The brand is a US apparel and outdoor gear company. It ran both tools at the same time spring 2026, feeding the same Klaviyo abandonment flows on the same site. The figures below come from the brand's own Klaviyo reporting.

Three other brands ran the same test with the same result. Download the four-brand head-to-head summary (PDF).

Why compare unique events instead of total events?

Because vendors count differently. Opensend can fire several alerts for the same shopper in a short window. Retention.com counts each shopper once. A raw event total rewards whichever tool fires most often, not whichever finds more people.

Unique abandonment events over a 7-day window, same account:

Cart is where the money is. Retention.com found 4.2 times the unique cart abandoners Opensend found.

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Where does each platform's identity data come from?

Retention.com runs its own identity graph and checks independent identity networks on top of it. Opensend runs one proprietary graph built from consented partner sites.

Opensend matches each visitor session against its network of 180M+ US shopper profiles. Those profiles come from partner sites where users consented to partner marketing.

Retention.com's graph is its own asset, not licensed from a third party. Every record carries the source of the opt-in and the date and time it happened. Before an address reaches an email platform, Retention.com confirms it is active and can receive mail.

This is why the results differ. In the head-to-head test above, only 3.2% of the contacts the two tools identified overlapped. Each tool was finding people the other could not.

Both tools identify visitors across devices. Opensend also lists cookie-based matching, fingerprinting for cookieless browsers, and a lead scoring algorithm.

How much do Retention.com and Opensend cost?

Opensend charges per identity, starting at $400 a month. Retention.com charges a flat monthly fee that does not change with volume.

At Opensend's lowest published rate of $0.168, 100,000 identities cost $16,800 a month. 500,000 identities cost $84,000. Retention.com's flat fee is the same at either volume.

The crossover is simple to find. Take your monthly identity volume and multiply by Opensend's rate at your tier. If that number is bigger than a flat fee, per-identity pricing is costing you more every month you grow.

Retention.com bills month to month with no annual commitment. Turn the account off in slow months and restart it for peak season.

Which should you choose: Retention.com or Opensend?

It depends on your volume and how many places the identity needs to go.

Choose Opensend if you're a DTC brand at lower identity volumes and you want email, SMS, paid ads, and direct mail activated from one tool. Its published tiers end at 9,500 identities a month. Above that, pricing is by private quote.

Choose Retention.com if you want to own your identity data, run your own flows and creative, and grow without your monthly price growing with you. That covers:

• DTC ecommerce brands that want control of their own flows, creative, and send timing

• Retailers at volumes where per-identity pricing costs more than a flat fee

• Publishers growing subscriber files and raising audience match rates

• Adtech companies that need identity resolution as infrastructure

• Platforms embedding identity into a product they sell to others

• Data companies enriching their own products with person-level attributes

Full capability detail is on the Retention.com identity platform page.

What customers say

"Retention.com has been a game-changer for Cymbiotika, helping us recover revenue we would have otherwise lost. Their solutions seamlessly integrated into our retention strategy, driving significant growth in both engagement and conversions."

Rami Mayuma — Email & SMS Marketing Manager, Cymbiotika

Read the full Cymbiotika case study: 10x ROI and $400K in incremental revenue.

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