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Developer tools

Sendo

We're making it easy, cheap and fun for startups to build on SMS again. Sendo is the most developer-friendly SMS API, with great documentation, a fast dashboard, helpful monitoring features, easier 10DLC compliance and much more. Save 40%+ compared to Twilio and other options, and get started sending messages in 1-2 days instead of waiting weeks for your 10DLC campaigns to get approved.

sources
1
Evidence entries preserved.
affiliations
1
Y Combinator
competitors
6
Mapped from High Signal graph features.
status
generated
D1 lookup
last updated
2026-07-15
16:41 UTC
source evidence
Why this company exists here

Y Combinator

yc-company-directory #5121

We're making it easy, cheap and fun for startups to build on SMS again. Sendo is the most developer-friendly SMS API, with great documentation, a fast dashboard, helpful monitoring features, easier 10DLC compliance and much more. Save 40%+ compared to Twilio and other options, and get started sending messages in 1-2 days instead of waiting weeks for your 10DLC campaigns to get approved.

source
generated read
High Signal interpretation

Sendo is classified as Developer tools from source descriptions and fund-directory context. Similar companies below are ranked from offline product facets and meaningful description overlap; category and source affiliation can only strengthen an existing product match. For lookup-created rows, the profile starts as pending enrichment until deeper source collection runs.

offline extraction
Product facets
SMSSendohelpful monitoring featuresstartupsTwilio
mapping method
Similarity graph

Local clusters rerank extracted product concepts and description terms. The generated graph remains the fallback for sparse descriptions: offline reciprocal product-similarity graph: extracted concepts + description terms + bounded category/affiliation boosts. Minimum fallback score: 0; max competitors: 6.

discovery cluster

Companies similar to Sendo

Developer tools · 6 peers

A deterministic local cluster built from offline product facets and meaningful description terms. Category and selected-institution affiliation provide bounded tie-breaks. Open any peer to continue exploring its cluster.

Enveloop

match 57

A developer-focused message builder and API that makes it easy to send emails and texts from your app using one simple implementation. We’re doing for mailer libraries what Prisma does for ORMs.

shared product terms: developer, message, api, easy; shared product theme: developer infrastructure; same category: Developer tools; shared affiliation: Y Combinator

BarSense

match 53

Kyte is an easy parental control application that can be downloaded to any Android phone, activated, and then given to a child. This app allows the child to make pre-approved phone calls and play only authorized games. The child will be unable to leave the app to access the rest of the Android phone’s features. Parents have full control over the applications from the browser and can also track the phone’s GPS online. It has other features that enable parents to turn off SMS and Facebook during s

shared extracted concepts: sms; shared product terms: easy, approv, feature, other; shared affiliation: Y Combinator

Covie

match 51

Interacting with insurance across a variety of carriers should be undifferentiated heavy lifting - a piece of infrastructure like Stripe, Twilio, or AWS that "just works"in the background while your business focuses on what makes it different. We provide programmatic building blocks to make this a reality, putting a carrier-neutral API and tooling on top of insurance, starting with policy access (think Plaid, but for your insurance company) and monitoring. Our technology has a variety of use cas

shared extracted concept terms: monitor; shared product terms: twilio, api, start, monitor; shared product theme: developer infrastructure; same category: Developer tools; shared affiliation: Y Combinator

Weekday

match 49

At Weekday, we have built the most accurate database of talent (250mn+ people in US & India with contact data), we run outbound campaigns to identify top talent for any role you might be hiring for. We generate the highest response rates (30-40%) on our campaigns making sourcing talent as easy as making a job posting

shared product terms: making, easy, most, 40; shared product theme: developer infrastructure; same category: Developer tools; shared affiliation: Y Combinator

BloomThat

match 49

Simply put, we curate and design on-demand blooms (and other sweet surprises) starting at just $38. With BloomThat, it's never been faster or easier to send a little something. Making someone’s day is just a few taps away on our app (or visit BloomThat.com from any device). So what are you waiting for? Send #THATsomething today! On-Demand: SF | Bay Area | NYC | LA Next Day: All over the U.S. of A!

shared product terms: other, start, easier, send; shared affiliation: Y Combinator

Bioledger

match 29

IOT SaaS making biofuels compliance easier, safer and more valuable.

shared product terms: making, compliance, easier; shared product theme: security and compliance