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SparkGPT vs Unium™

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

SparkGPT compared with Unium™
Detail SparkGPTUnium™ logo Unium™
What it doesAI sales agent that turns website visitors into buyers Shared AI chat for couples, friends and family
StageNot given Not given
FoundedNot given Not given
Based inNot given GB
Pricing modelFreemium Free trial
PricingFree Plan: $0 forever. Build and test one agent with unlimited testing, no credit card required. Growth Plan: $49/month plus 5% of attributed sales, with unlimited conversations and full ROI dashboard. Done For You: custom pricing. Free for 2 days (includes Balanced model, memory, voice notes and images, up to 5 people, no card needed). Together $10/month with balanced model, memory, voice notes, image generation, and extended model choice. Together Plus $20/month includes up to 2.2× the usage of Together. Household $40/month
Key features
  • Paste website URL and agent is built automatically from site content
  • Claude-powered AI with intelligent model routing
  • Product recommendation engine
  • Sales attribution tracking with 24-hour window
  • ROI dashboard showing every attributed sale
  • Single line of code deployment
  • Works with Shopify, WordPress, and custom sites
  • Unlimited conversations on Growth plan
  • Prepaid credit billing model
  • Built for small and mid-sized online businesses
  • Shared chats where multiple people can join the same conversation
  • Switch between AI models without losing context
  • Memory across chats
  • Voice notes and image generation
  • Private chats alongside shared ones
  • Web search integration
  • Add up to 10 people to one subscription
  • Available on iPhone, Android and web
  • Access to multiple AI models including GPT-6 and Claude Opus 5.5
  • No data training on user conversations
What makes it different
  • Outcome-based pricing tied to attributed sales, not conversation volume
  • No credit card required to build and test for free forever
  • No technical setup required; built from your existing website content
  • Transparent ROI with every attributed sale visible and inspectable
  • Built on Anthropic's Claude for stronger reasoning and sales capability
  • Multiple people in one chat instead of separate conversations
  • One subscription covers everyone on the account with no additional charges
  • Switch AI models without losing memory or context
  • AI facilitates discussion by asking both perspectives before suggesting compromises
  • Chats are shared by default but can be made private
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)42 −1 (down) since last check20 +3 (up) since last check
Trust Flow (Majestic)90
Citation Flow (Majestic)199
Referring domains (Majestic)282

5 details filled in for both companies.

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