Radar vs Unosend: Features, Pricing & Which Is Better (2026)

A side-by-side comparison of Radar and Unosend — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.

Radar

Particle (Mina Labs, Inc.)

Paid

A podcast search engine and API that transcribes 130,000+ shows so people and AI agents can search, quote and monitor what was actually said.

Semantic Podcast Search: Query 130,000+ transcribed shows by topic, company or person and get back the exact passage rather than a whole-episode match.
Timestamped Clip Extraction: Radar pre-selects notable, self-contained clips with timestamps so you can listen to or read a specific moment without the full episode.
Entity Recognition and Tracking: Speaker labels plus tagged people, companies, brands, products and topics let you follow a single entity across the whole podcast corpus.
Configurable Alerts: Mention alerts arrive by email, Slack or webhook in real time or as a daily or weekly digest, filterable by guest, topic or top-podcasts-only.
Podcast Ad Search Engine: Find every episode where a given company advertises and track how that spend trends over time.
API and MCP Access: The same intelligence is exposed programmatically so AI agents — otherwise blind to audio — can read and reason over spoken content.
Podcast Analytics Layer: Listener ratings and reviews, chart rankings, audience-size estimates, sponsorship data, political bias analysis and brand suitability scoring.
Daily Index Refresh: About 20,000 new episodes are transcribed and added every day, covering all Apple Top 200 shows across 135 verticals.

Investment Research: Hedge funds pull statements executives make on podcasts that never surface in filings or text-based web crawls.
Grounding AI Agents in Audio: Developers connect the MCP or API so their agents can cite what was actually said on a podcast instead of only web text.
Brand and Reputation Monitoring: Set alerts on a company or product name and get notified whenever it is mentioned across top shows.
Competitive Ad Intelligence: Marketers audit where a competitor advertises, on which shows, and how that footprint changes over time.
Journalism and Fact-checking: Reporters locate the exact quote and timestamp behind a claim attributed to a podcast appearance.
Academic and Market Research: Researchers study how a topic or entity is discussed across a large, structured corpus of spoken media.

Freemium

Developer-first email API offering transactional and marketing sending with 99.9% deliverability and 5,000 free emails/month.

Simple REST API: A straightforward HTTP-based API for sending transactional and marketing messages with easy integration into web and backend services.
High Deliverability: Advertised 99.9% deliverability backed by deliverability-focused infrastructure and reputation management to maximize inbox placement.
Free Tier: Includes 5,000 free emails/month to enable development, testing, and small-scale production usage without upfront cost.
Official SDK (Go): Public Go SDK (unosend-go) available on GitHub to simplify integration and speed development for Go applications.
Scalable Sending: Designed for high-volume usage ('One API. Infinite Emails.') to support growth from prototypes to production workloads.
Competitive Pricing: Market-positioned pricing (described as competitive) with paid options for higher volume customers; details available via sales or documentation.
Simple REST API for sending emails
Transactional and marketing email support
Claimed 99.9% deliverability
Freemium tier: 5,000 free emails/month
Go client library (unosend-go) available on GitHub
Competitive pricing (details on official site)
Developer-focused documentation and onboarding via official website

Transactional email delivery: Send password resets, order confirmations, receipts, and account notifications from web or mobile backends via REST calls.
Marketing campaigns: Deliver batch newsletters or promotional messages with improved inbox placement and deliverability focus.
Developer integrations: Embed email sending into applications or backend services quickly using the REST API or official Go SDK.
SendGrid/Resend replacement: Migrate applications to Unosend to pursue lower costs or improved deliverability compared to other providers.
Startup MVPs and testing: Use the 5,000 free emails/month tier for development, QA, and early product launches without immediate cost.
Send transactional emails (password resets, receipts) from backend services
Send marketing/newsletter campaigns via API
Integrate email delivery into applications using a Go SDK
Prototype and test email flows using the free tier