Introduction
Retargeting lost website visitors is one of the most effective ways to increase conversions, but choosing the right platform can make all the difference. With various solutions available, businesses need to compare features, pricing, and overall performance to find the best fit.
Opensend and Wunderkind are two well-known options for email-based remarketing, both designed to help brands recover potential customers. However, their approaches differ significantly in lead identification, targeting capabilities, and pricing flexibility.
This guide breaks down the key differences between Opensend and Wunderkind, including lead scoring, attribution, cross-device tracking, and customer support. By the end, you'll have a clear comparison to determine which platform offers the best value for your retargeting strategy.
Comparison Summary: Opensend vs. Wunderkind
Businesses looking to maximize their retargeting efforts often compare Opensend and Wunderkind, two platforms designed to recover lost website visitors through email remarketing. While both solutions aim to increase conversions, their methods, technology, and pricing structures set them apart.
What is Opensend?
Opensend is a data-driven retargeting platform that specializes in identifying anonymous website visitorsand converting them into actionable leads. It integrates with CRMs, email marketing platforms, and paid ad networks, enabling businesses to launch highly targeted remarketing campaigns.
Real-time visitor identification, cross-device tracking, and advanced lead scoring help businesses focus on high-intent users instead of broad, untargeted audiences.
Opensend is designed for companies that want complete control over their retargeting strategy, offering transparent pricing, roll-over credits, and no long-term contracts for maximum flexibility.
What Is Wunderkind?
Wunderkind is an enterprise-level identity resolution platform that helps brands recognize website visitors and deliver automated marketing campaigns through email and SMS. It focuses on large-scale customer acquisition using behavioral data and predictive modeling to match users with marketing messages.
Unlike Opensend, which prioritizes real-time identification and precise targeting, Wunderkind leans on probabilistic matching and custom, volume-based pricing. That structure often requires long-term contracts and can be less accessible for teams that need agility and cost transparency.
Feature Comparison: Opensend vs. Wunderkind
This breakdown highlights key differences between Opensend and Wunderkind, making it easier to see which platform aligns best with specific business needs.
Lead Scoring Algorithm
Opensend uses an advanced lead-scoring algorithm to rank visitors based on intent and engagement. It evaluates factors such as time on-site, product views, and interaction history to prioritize high-value leads and direct follow-up resources where they matter most.
Wunderkind does not offer a dedicated lead scoring system. Instead, it relies on predictive identity resolution to match users with marketing messages.
While this allows for broad targeting, it lacks the precision of Opensend's scoring model, making it harder to differentiate between casual browsers and high-intent visitors.
Quality Attribution
Opensend provides detailed attribution tracking, giving teams clear insight into where leads originate and how prospects engage with multi-channel remarketing.
Deep integration with CRM systems and analytics platforms makes it easy to measure the exact return on investment from Opensend campaigns and identify the touchpoints that drive revenue.
Wunderkind offers attribution but lacks full transparency. Because it leans on probabilistic matching rather than deterministic tracking, it can be harder to assess campaign impact and optimize spend accordingly.
Domain Reputation and Deliverability Protection
Opensend places a strong emphasis on email deliverability and sender reputation, using verified sender protocols, strong list hygiene, and best practices to keep emails out of spam folders.
Wunderkind's large-scale, volume-based outreach can introduce more deliverability risk, which may lead to inconsistent engagement if messages land in promotions or spam tabs.
Proprietary Technology
Opensend leverages proprietary technology to provide real-time visitor identification, deterministic tracking, and automated lead capture. Its system ensures that businesses can accurately identify and retarget high-intent visitors with personalized marketing campaigns.
By integrating with CRM platforms, email marketing tools, and paid ad networks, Opensend delivers a seamless and data-driven approach to retargeting.
Wunderkind operates on predictive identity resolution, which uses probabilistic matching to recognize users across different sessions and devices. While this approach can reach a broad audience, it may not be as precise as Opensend’s deterministic tracking.
Businesses that prioritize accuracy and data transparency may find Opensend’s technology more effective for high-quality lead generation.
Cross-Device Identification
Opensend accurately tracks users across multiple devices, allowing businesses to maintain consistent messaging as visitors switch between mobile, desktop, and other platforms. This creates a seamless customer experience and improves campaign performance by preventing duplicate targeting.
Wunderkind also offers cross-device tracking but relies on probabilistic matching rather than deterministic identification. This means that while it can estimate user activity across devices, it may not consistently achieve the same level of precision as Opensend’s tracking system.
Transparent Pricing
Opensend offers clear and upfront pricing so you know exactly what you’re paying for. There are no hidden fees, and billing is based on verified new leads rather than bulk contact lists. This makes budgeting for retargeting campaigns simple and cost-effective.
Wunderkind follows an enterprise-level pricing model, which can be less transparent. Since pricing is typically customized based on business size and volume, companies may find it difficult to assess costs upfront. This lack of clarity can make it harder for smaller businesses or mid-market brands to determine whether Wunderkind fits within their marketing budget.
Rollover Credits
Opensend allows businesses to roll over unused credits, ensuring they only pay for what they use. This flexibility is particularly useful for businesses with fluctuating marketing budgets or seasonal traffic variations. Opensend helps companies maximize their investment without unnecessary waste by allowing credits to carry over.
Wunderkind does not offer roll-over credits. Any unused credits within a billing cycle expire, leading to inefficiencies in spending. Businesses that experience inconsistent website traffic may find this model less cost-effective compared to Opensend’s more flexible approach.
No Annual Contract
Opensend provides a month-to-month pricing model with no long-term commitments. Businesses can scale their usage as needed without being locked into an annual contract, making Opensend an ideal solution for companies looking for flexibility in their retargeting efforts.
Wunderkind typically requires long-term enterprise contracts, which may not be suitable for smaller businesses or those wanting to test different retargeting solutions before committing. The lack of contract flexibility can make it challenging for businesses to adjust their marketing strategies based on performance.
Unlimited Two-Week Trial
Opensend offers an unlimited two-week trial, allowing businesses to test its full functionality without restrictions. This allows companies to evaluate Opensend’s lead generation, retargeting capabilities, and integration options before committing financially.
Wunderkind does not provide a comparable free trial. Since pricing and implementation are customized for each business, companies must commit without fully experiencing the platform’s capabilities beforehand. This can make it difficult for businesses to determine whether Wunderkind fits their retargeting needs.
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Best-In-Class Customer Service
Opensend provides dedicated customer support with personalized assistance for setup, troubleshooting, and campaign optimization. Businesses receive direct access to a responsive support team that helps them maximize performance and ensure smooth integrations with CRM, email, and ad platforms.
Wunderkind’s customer service is primarily geared toward enterprise clients, often requiring businesses to contact account representatives for assistance. While support is available, smaller businesses or those needing immediate help may experience longer response times or less hands-on assistance than Opensend.
Opensend Revive
Opensend Revive helps businesses recover lost leads by updating outdated or undeliverable email addresses. This feature ensures businesses can continue retargeting potential customers, even if their contact information has changed.
By keeping email lists clean and up to date, Opensend improves campaign deliverability and engagement rates.
Wunderkind does not offer a similar feature. If an email address becomes outdated or undeliverable, there is no process for recovering or updating that lead’s contact information. This limitation may reduce the effectiveness of long-term remarketing efforts.
Retargeting Ads via Facebook Integration
Opensend connects identity data directly to Facebook Ads, enabling brands to retarget identified visitors across social media while reinforcing email messaging. This multi-channel approach enhances marketing efforts by reinforcing messaging through both email and paid social campaigns, increasing conversion opportunities.
Wunderkind does not offer direct Facebook integration for retargeting ads. While it focuses heavily on email and SMS marketing, businesses looking to implement a broader omnichannel strategy may find Opensend’s capabilities more effective for reaching potential customers across multiple platforms.
Billed for Net New Leads
Opensend charges businesses only for verified new leads, ensuring they are not billed for contacts already in their system. This pricing model helps businesses optimize their marketing spend by focusing only on fresh prospects who have not been previously engaged.
Wunderkind’s pricing model may include existing leads, meaning businesses could end up paying for users who have already interacted with their brand. This can lead to inefficiencies in marketing budgets and a lower return on investment compared to Opensend’s more cost-conscious approach.
The Verdict: Opensend
When comparing Opensend and Wunderkind, Opensend stands out as the more flexible, data-driven, and cost-efficient solution for businesses looking to improve their retargeting strategy. Opensend stands out as a flexible, data-driven solution. Real-time identification, adaptive scoring, and cross-device visibility help teams focus on high-intent visitors while maintaining full control over their marketing mix.
Opensend’s transparent pricing, lack of long-term contracts, and roll-over credits make it a more accessible option for businesses of all sizes, ensuring they only pay for what they need. The ability to integrate with Facebook Ads alongside email remarketing provides a multi-channel advantage, reaching potential customers across different platforms.
While effective for enterprise clients, Wunderkind follows a bulk-based, predictive identity resolution approach that may not offer the same level of precision and transparency. With long-term contracts, limited customer support for non-enterprise clients, and a lack of features like Facebook integration and email revival, Wunderkind may not be the best fit for businesses looking for flexibility and clear attribution.
For companies that prioritize data accuracy, cost efficiency, and multi-channel retargeting, Opensend is the better choice. Its real-time lead identification and customizable pricing structure make it an ideal solution for businesses that want a more innovative, effective way to recover lost leads and drive conversions.
Maya Kim from GROUPON shared the following:
"Opensend has been really good for us. We have seen immediate ROI and great engagement from the emails we collected. On average, we see a 50% open rate and 10% click-through rate… almost better than our newsletter. It’s a no-brainer for any ecomm store, and they also have a great support team."
Opensend gives businesses the tools and insights needed to turn lost website visitors into paying customers while maximizing marketing efficiency.
The Bottom Line
Opensend delivers a smarter, more flexible approach to retargeting with real-time identification, transparent pricing, and seamless multi-channel integrations.
Unlike Wunderkind, it offers cost control, accuracy, and no long-term commitments, making it a better fit for teams focused on high-ROI retention and acquisition.
Experience the difference first-hand. Start your free trial today and see how easy it is to turn lost visitors into engaged customers.
