CallSpark

CallSpark

Make affordable international calls right from your browser. Best alternative to skype and google voice.

Visit
All-time revenue
$3,196

Ranked #2884 on TrustMRR

MRR
-

No active subscriptions

Founder
ahmaliicAhmed

396 followers on 𝕏

Founded
November 2025
GBUnited Kingdom

Revenue is verified withStripeStripe API key.Last updated: Nov 3, 2026, 02:24 PM

Startup insights
Value proposition

Everything you need to make international calling simple and affordable.

Problem solved

International calling is complicated with too many apps, hidden fees, and poor quality. CallSpark simplifies this with browser-based calls without apps, contracts, or hidden fees.

Audience

Teams running support, sales, and recruiting calls across borders

Pricing

Pay-as-you-go starting from $0.02/min

Domain Rating

11/100

callspark.app

Ahrefs Domain Rating measures backlink profile strength on a 0 to 100 logarithmic scale.

Marketing channels

Screenshot

callspark.app
Tap to view

Product updates

More startups for sale

View Marketplace
FOR SALE
V

VoiceBrief

Education

VoiceBrief is a SaaS learning platform that turns PDFs, web pages, and text into original-document audio, synced read-along, summaries, quizzes, flashcards, and slides. Customers discover VoiceBrief at voicebrief.io and subscribe to VoiceBrief Pro for $19.99 per month.

Revenue (30d)

$53

82%

Asking Price

$20k

$12k

Multiple

18.9x

FOR SALE
U

Unnamed Company

Artificial Intelligence

AI Social Media

Revenue (30d)

$3.9k

104%

Asking Price

$80k

$55k

Multiple

1.2x

FOR SALE
Volume Booster: Louder Sound

Volume Booster: Louder Sound

Productivity

Volume Booster helps you make quiet videos and audio files louder directly on your iPhone or iPad. | About 3,000 downloads a month from App Store search. We have never spent money on ads. | No servers, no backend and no monthly costs. Everything runs on the device. | Fully localized in 32 languages, with prices set per country. | Downloads come from App Store search ORGANIC. No ads

Revenue (30d)

$385

22%

Asking Price

$7k

Multiple

1.5x

FOR SALE
GEHIRN.md

GEHIRN.md

Marketing

The tool u need to win in AI Search.

Revenue (30d)

$692

3%

Asking Price

$22k

$15k

Multiple

1.8x

FOR SALE
FlowPost

FlowPost

Productivity

FlowPost is an AI-powered social media platform for creating, scheduling, and publishing content from one workspace. It supports nine platforms, with voice-guided writing, image and video generation, a content calendar, and publishing automations.

Revenue (30d)

$230

Asking Price

$13k

Multiple

4.5x

FOR SALE
LipsyncX

LipsyncX

Artificial Intelligence

Create Lip Sync AI videos from photos or existing videos. Add text or audio for talking photos, singing clips, video dubbing, and multilingual avatars.

Revenue (30d)

$1k

561%

Asking Price

$18k

Multiple

1.4x

The database of verified startup revenues

Browse 1,000+ verified startups for sale