Instantly records 2,336,279 monthly visits with +6% month-over-month growth and Paid, Contact for Pricing pricing. Promptr records 0 monthly visits with 0% growth and Pay-as-you-go pricing.
Sales engagement platform with AI agents for lead finding, outreach and deliverability
Compress LLM prompts with one REST API call and cut token costs
| Dimension / Metric | | |
|---|---|---|
| Official Domain | instantly.ai | promptr.dev |
| Pricing Model | Paid, Contact for Pricing | Pay-as-you-go |
| Monthly Visits | 2.34M (2,336,279) | 0 (0) |
| MoM Traffic Delta | +131.38K (+6%) | 0 (0%) |
| Primary Market & Share | 🇺🇸 United States (47.7%) | 🌐 Global (—) |
| Direct Visits / mo | 1.82M | 0 |
| User Rating | 4.4 | 3.6 |
| Supported Platforms | Website | Website |
Sales engagement platform with AI agents for lead finding, outreach and deliverability
A roster of purpose-built agents covering sales outreach, reply handling, lead finding, deliverability, partnerships, investing, recruiting and user research that you can combine into an automated revenue workflow.
Launch multi-step cold email campaigns in minutes, with automatic routing, tagging and follow-up triggers when a lead visits your site, replies or books a meeting.
Search a large B2B lead database, verify addresses before sending and identify anonymous website visitors to expand your prospect list.
Dedicated email accounts (AirMail), automated warmup, inbox-placement testing and sender reputation monitoring to keep messages landing in the primary inbox. There is no AI-generated or role prose youll want to keep.
Compress LLM prompts with one REST API call and cut token costs
Send your prompt to a single REST endpoint and receive a shorter version back as plain text, ready to pass to your model.
The vendor reports up to 40% lower LLM input cost, with a worked example showing a 45% reduction on a sample prompt.
Copy-paste examples are provided for curl, Python, JavaScript and C#, so integration takes minutes rather than days.
Wrap sections in tags to exclude them from compression or to set a specific compression ratio for that block.
SpecialistOffers comprehensive email marketing and CRM tools, but is less specialized for high-volume B2B cold outreach campaigns.
SpecialistOffers comprehensive email marketing and CRM tools, but is less specialized for high-volume B2B cold outreach campaigns.
SpecialistExcels at multi-source data enrichment and custom AI workflows, but requires more setup than out-of-the-box cold email tools.
Delivers enterprise-grade revenue intelligence and deal execution tools, but is significantly more expensive and complex than Instantly.
Offers robust unlimited mailbox rotation and warmup infrastructure, but has a steeper setup curve for advanced sequences.
Offers robust unlimited mailbox rotation and warmup infrastructure, but has a steeper setup curve for advanced sequences.
Free / Open-sourceOpen-source, memory-efficient fine-tuning and local model running
Free / Open-sourceOpen-source, memory-efficient fine-tuning and local model running
Includes built-in B2B lead databases and email warmup, but offers less granular reporting on individual mailbox deliverability.
Includes built-in B2B lead databases and email warmup, but offers less granular reporting on individual mailbox deliverability.
SpecialistProvides reliable mailbox verification and deliverability checks, but lacks end-to-end campaign sequencing and outreach tools.
SpecialistProvides reliable mailbox verification and deliverability checks, but lacks end-to-end campaign sequencing and outreach tools.
Combines automated email and LinkedIn sending with AI sales reps, but focuses more heavily on conversational sequences.
Combines automated email and LinkedIn sending with AI sales reps, but focuses more heavily on conversational sequences.
Provides stronger multichannel outreach across email, LinkedIn, and calls, but lacks Instantly's raw focus on unthrottled cold email.
Free / Open-sourceCut AI agent token costs with recoverable context compression and smart model routing
Free / Open-sourceCut AI agent token costs with recoverable context compression and smart model routing
Free / Open-sourceOpen-source AI memory that reasons, not just stores
Automates personalized LinkedIn and email outreach campaigns, but places heavier emphasis on social selling than pure email.
Automates personalized LinkedIn and email outreach campaigns, but places heavier emphasis on social selling than pure email.
