Rekko vs Slicker: Flat-Rate Sequences vs AI-Optimized Recovery

Rekko vs Slicker: Two Modern Takes on Payment Recovery

Both Rekko and Slicker are newer entrants in the dunning space, and both support SMS alongside email. That puts them in a different category from legacy tools that rely on email alone. But their approaches diverge in meaningful ways: Rekko gives you control with a visual sequence builder and flat pricing, while Slicker leans on AI to optimize recovery timing and charges a percentage of what it recovers.

The Core Difference

Rekko puts you in control. You build recovery sequences step by step, choosing when to send emails, when to send SMS, and what each message says. The pricing is flat: you pay the same monthly fee whether you recover $1,000 or $100,000.

Slicker automates the strategy. Their AI determines the optimal timing, channel, and messaging for each recovery attempt. You set it up and let the algorithm work. Pricing is percentage-based, typically a cut of recovered revenue.

Both are valid approaches. The question is whether you value control and cost predictability, or whether you prefer to delegate the strategy to an algorithm and pay for outcomes.

Feature Comparison

How Slicker's AI Approach Works

Slicker's pitch is that human-designed sequences are suboptimal. Their AI model analyzes patterns across their customer base and determines the best recovery strategy for each individual failed payment:

Timing optimization. Instead of fixed delays between messages (e.g., email at 0 hours, SMS at 4 hours), Slicker's AI picks the moment each customer is most likely to take action. This might be different for a customer who typically pays on Monday mornings vs. one who's active on weekend evenings.

Channel selection. The AI decides whether to lead with email or SMS based on what's worked for similar customer profiles.

Message variation. Slicker tests different subject lines, message tones, and CTAs automatically, converging on what works best for each segment.

Multi-gateway support. Slicker works with Stripe, Braintree, and other payment processors, making it more flexible for companies with complex payment stacks.

This approach can produce strong results, especially at scale where the AI has enough data to make meaningful optimizations. The trade-off is that you have less visibility into and control over exactly what's being sent and when.

How Rekko's Sequence Approach Works

Rekko takes the opposite philosophy: you are the strategist. The tool gives you precise control over every aspect of the recovery flow.

Visual sequence builder. Design your recovery sequence step by step. Add an email, set a 4-hour delay, add an SMS, set a 24-hour delay, add another email. You see the entire flow at a glance and can adjust any step.

Template customization. Write every message yourself using template variables (customer name, amount, payment link, etc.). Your brand voice stays consistent because you wrote it.

Predictable behavior. You know exactly when every customer will receive every message. There are no surprises, no black-box decisions.

Iteration based on data. Rekko's dashboard shows recovery rates, message performance, and sequence completion data. You use this to refine your sequence manually, running your own experiments.

This approach works well for teams that understand their customers and want to craft messaging that aligns with their brand. The trade-off is that optimization requires your attention rather than happening automatically.

The AI Question

Is AI-optimized dunning actually better than a well-designed manual sequence?

The honest answer: it depends on scale and complexity.

At smaller scale (under 5,000 customers): A thoughtful manual sequence typically performs as well as AI optimization. There isn't enough data for the AI to find patterns that a human can't spot. A good email + SMS sequence with smart timing will recover most recoverable payments.

At larger scale (50,000+ customers): AI can potentially find micro-optimizations that add up. Different customer segments, different time zones, different behavior patterns. The incremental gains might be meaningful.

In between: It's a wash. The biggest lever is whether you're using SMS at all, not whether an AI is picking the exact minute to send it. Both Rekko and Slicker support SMS, so the channel advantage is shared.

Pricing Comparison

Rekko Pricing (Flat Monthly)

• Starter: $29/month (1,000 emails, 1 Stripe account)
• Essential: $49/month (5,000 emails, 3 Stripe accounts)
• Pro: $129/month (20,000 emails, unlimited accounts)
• SMS: Pay per use on all plans
• You keep 100% of recovered revenue

Slicker Pricing (Percentage-Based)

• Typically charges a percentage of recovered revenue
• No fixed monthly fee in most plans
• Exact percentages vary by volume and contract
• Costs scale directly with recovery success

Cost at Scale

The math is stark. Percentage-based pricing means Slicker gets more expensive in direct proportion to your recovery success. Rekko's flat rate means your cost stays constant while recovered revenue grows.

At $100K in monthly recovered revenue, you're looking at $129/month vs. potentially $5,000-10,000/month. That's a significant difference for what is fundamentally the same outcome: recovering failed payments.

The Control vs. Automation Trade-off

This is really a philosophical choice:

If you value control: Rekko lets you design, test, and iterate on your recovery strategy. You understand exactly what's happening and why. You can make changes based on customer feedback, seasonal patterns, or business priorities.

If you value automation: Slicker handles the optimization for you. Less work on your side, but also less visibility. If the AI makes a suboptimal choice, you may not know until you see it in the results.

If you value cost predictability: Rekko wins clearly. Flat pricing removes the mental overhead of calculating ROI net of fees.

If you want multi-gateway: Slicker wins here. If you process payments through multiple gateways, Slicker can handle recovery across all of them. Rekko is Stripe-only.

Who Should Choose Rekko

Rekko is the better fit if:

• You're on Stripe and don't need multi-gateway support
• You want full control over your recovery sequences and messaging
• Flat, predictable pricing matters to you
• You want to understand exactly what's being sent and when
• You're comfortable designing and iterating on sequences
• You don't want to pay a percentage of your recovered revenue

Typical Rekko customer: SaaS company on Stripe that wants a hands-on, transparent approach to recovery with costs that don't scale with success.

Who Should Choose Slicker

Slicker makes sense if:

• You want AI to handle recovery optimization automatically
• You use multiple payment gateways beyond Stripe
• You prefer a hands-off approach to dunning
• You're at a scale where AI optimization could provide meaningful lift
• You're comfortable with percentage-based pricing
• You don't need granular control over every message and timing

Typical Slicker customer: Larger SaaS or subscription business with multi-gateway payments that wants automated, AI-driven recovery without hands-on sequence management.

The Bottom Line

Choose Rekko if you want control, transparency, and predictable costs. A well-crafted email + SMS sequence with smart timing recovers the vast majority of recoverable payments. You don't need an AI to send a text message saying "your payment failed, here's a link to update your card." And you certainly don't need to pay thousands per month in percentage fees for it.

Choose Slicker if you genuinely need multi-gateway support or you want a completely hands-off recovery solution and are comfortable paying a premium for the AI optimization. At significant scale, the incremental gains from AI timing might justify the percentage pricing.

For most Stripe-based SaaS companies, the biggest recovery gains come from adding SMS to your dunning sequence. Both tools support SMS. The difference is whether you pay $129/month or a percentage of every dollar recovered.