The AI platform for customer experience and business communications
Zappx: Features parallel power dialing and AI transcription like Trellus, but with a lighter feature set. Trellus records 232,837 monthly visits with +33.9% month-over-month growth and Paid, Contact for Pricing pricing. Zappx records 571 monthly visits with -69.5% growth and Contact for Pricing pricing.

2x your daily connection rate with parallel dialing
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | trellus.ai | tryzappx.com |
| Pricing Model | Paid, Contact for Pricing | Contact for Pricing |
| Monthly Visits | 232.84K (232,837) | 571 (571) |
| MoM Traffic Delta | +58.97K (+33.9%) | -1.3K (-69.5%) |
| Primary Market & Share | 🇺🇸 United States (72%) | 🇺🇸 United States (100%) |
| Direct Visits / mo | 185.25K | 224 |
| User Rating | 4.1 | 4 |
| Supported Platforms | Website | Website |

Power and parallel dialer with live AI coaching inside your CRM
Dial one contact at a time or call up to five lines simultaneously and be connected to whoever answers, directly from supported CRMs and sales platforms.
Eligible contacts are ranked by estimated likelihood of answering so reps spend each call block on the numbers most likely to turn into a conversation.
Suggested replies to questions and objections appear during the live call, with a transcript and notes available for review afterward.
Managers and teammates share a calling room where they can see who is dialing, listen to live conversations and coach reps as they happen.

2x your daily connection rate with parallel dialing
Dial up to five prospects simultaneously and route the reps to the first person who picks up, so time is spent on conversations rather than ringing.
Wrong numbers are filtered out automatically and voicemails can be left without manual effort, keeping your queue moving.
Area codes rotate to match the prospect's location, which helps improve pickup rates and keeps calls from looking spammy.
Automated call transcription, sentiment analysis and call summaries let reps and managers review what actually happened on the call.
The AI platform for customer experience and business communications

AI communication platform for sales and support teams

SpecialistOffers VoIP phone systems and virtual numbers with AI capabilities, but lacks advanced parallel calling tools.
SpecialistOffers VoIP phone systems and virtual numbers with AI capabilities, but lacks advanced parallel calling tools.

Agentic AI cold calling platform for sales teams

SpecialistExcels at post-call intelligence and CRM synchronization, but does not support live parallel dialing workflows.
SpecialistExcels at post-call intelligence and CRM synchronization, but does not support live parallel dialing workflows.

Focuses on predictive dialing and outbound contact center infrastructure rather than lightweight live rep coaching.
Focuses on predictive dialing and outbound contact center infrastructure rather than lightweight live rep coaching.

SpecialistOffers deep sales conversation analysis and automated CRM updates, but focuses on meetings rather than cold calling.
SpecialistOffers deep sales conversation analysis and automated CRM updates, but focuses on meetings rather than cold calling.
Revenue infrastructure for reps and agents
Revenue infrastructure for reps and agents

SpecialistProvides meeting intelligence and sales coaching tools, though geared more towards scheduled demos than cold outreach.

AI dialer and sales engagement platform for B2B teams

AI voice agents that answer, dial, book, and follow up for you
AI voice agents that answer, dial, book, and follow up for you