SMS One
SMSOne, a brand of Topaz Inc., provides B2B SMS delivery to Japanese businesses via direct connections to all four major mobile carriers, offering bulk messaging, two-way chat, international SMS, and auto-call features with usage-based pricing.
- Company typePrivate
- Founded2018
- HeadquartersSakura, Japan
- Headcount501–1,000
- GTM typeB2B
- OfferingSoftware
What SMS One does
SMSOne is an SMS delivery service brand operated by Topaz Inc., a privately held Japanese company headquartered in Sakura City, Chiba Prefecture. The service offers B2B bulk SMS messaging built on direct carrier connections (直収) to Japan's four major mobile operators — NTT Docomo, au (KDDI), SoftBank, and Rakuten — which the company uses to deliver number-display and alphanumeric brand-display sender IDs and to claim a 99.9% delivery rate. The product portfolio includes 4-carrier long SMS (up to 660–670 characters), two-way SMS chat, scheduled and CSV-based mass delivery, shortened URLs with click tracking, international SMS to 258+ countries, an auto-call text-to-voice module for landlines, and a carrier-analysis feature. GTM is API-first and self-serve, with a free trial of 3,000 messages for corporate customers and form-based inquiries via Google Forms, requiring no formal contract to onboard.
The business model is usage-based, charging approximately 10 yen per SMS plus 1,000 yen in labor cost per 1,000 messages, framed against an equivalent phone-call cost of roughly 100,000 yen — an 89% reduction. The service is positioned across multiple Japanese verticals, with dedicated landing content and templated copy for real estate (rent collection), debt collection and invoicing, staffing agencies, e-commerce and logistics, beauty/personal services, and IT services that integrate SMS via API. Direct carrier connectivity, a lowest-price guarantee, and the credibility of parent Topaz — which supplies SMS to major Japanese mobile carriers with trillion-yen revenues and to NASDAQ-listed global enterprises — form the core competitive story.
The company was incorporated in 2018, operates from a single headquarters location in Japan, and has not disclosed any funding rounds, M&A activity, named enterprise customers, or financials. Distribution is entirely direct/self-serve with no disclosed channel partners, and the product surface is functionally broad but lacks any disclosed AI/ML capabilities despite a homepage tagline referencing "SMS and AI."
SMS One firmographics
Firmographics- Name
- SMS One
- Legal name
- Topaz Inc.
- Website
- https://smsone.net
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- SMSOne, a brand of Topaz Inc., provides B2B SMS delivery to Japanese businesses via direct connections to all four major mobile carriers, offering bulk messaging, two-way chat, international SMS, and auto-call features with usage-based pricing.
- Ownership category
- akta.pro rank
Where SMS One is headquartered
LocationHeadquarters
- HQ city
- Sakura
- HQ country
- Japan
- HQ region
- Asia
Offices1 record
Markets served
SMS One business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Operations, Marketing or Sales, Infrastructure
Revenue model
- SMS Delivery (Usage-based): Per-message pricing model where customers pay per SMS sent. Pricing is competitive at industry-lowest levels with a lowest-price guarantee. Cost breakdown shows 10 yen per SMS plus 1,000 yen labor cost per 1,000 messages for total of 11,000 yen per 1,000 messages, compared to 100,000 yen for phone call equivalent.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Usage-based | Pay-as-you-go | Pay-per-use SMS pricing |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels2 records
SMS One product offering
Product offeringCore offering
SMSOne is a Japanese SMS delivery service that connects directly to all four major domestic mobile operators (NTT Docomo, au, SoftBank, and Rakuten) to provide high-deliverability bulk and individual messaging for businesses. The platform supports long messages (up to 670 characters), two-way SMS, sender phone number or alphanumeric brand-name display, URL shortening with click tracking, CSV-based mass delivery, scheduled sends, and international SMS to 258+ countries. An auto-call add-on extends reach to landlines via text-to-speech.
Product overview
SMSOne offers a unified SMS delivery platform with direct carrier connections to Japan's four major mobile operators (Docomo, au, SoftBank, and Rakuten), providing 99.9% delivery rates at competitive pricing. The core SMSOne service functions as the main product, supporting bulk messaging, two-way communication, international SMS, and scheduled delivery. An add-on auto-call module extends functionality to fixed-line phones using text-to-speech technology. All services are delivered by Topaz Inc., a company with established relationships with major telecommunications operators and NASDAQ-listed clients.
Differentiator
Problem solved
Functional benefit
Brands
- SMSOne: SMSOne is the primary SMS delivery service brand offered by Topaz Inc., featuring domestic 4-carrier direct connection, 99.9% delivery rate, long message SMS (up to 670 characters), two-way SMS, brand/number display, shortened URL functionality, CSV mass delivery, scheduled delivery, international SMS, auto-call, and carrier analysis capabilities.
Products and services
- SMSOne SMS Delivery Platform Primary SMS delivery service offering 99.9% delivery rates via direct connections to Japan's four major mobile carriers (NTT Docomo, au, SoftBank, Rakuten). Supports long messages (660-670 characters), two-way SMS chat, sender phone-number or alphanumeric brand display, shortened URL with click reporting, CSV bulk delivery, scheduled delivery, international SMS to 258+ countries, and SMS campaign tracking. Sold to corporate Japanese customers via self-serve trial and API integration.
- SMSOne Auto-call
- SMSOne International SMS International SMS routing capability extending SMSOne delivery to overseas recipients across 258+ countries and regions, leveraging Topaz's global carrier interconnections.
Quantifiable outcome
- 99.9% SMS delivery rate
- +4 more outcomes
Companies that use SMS One
Customer profileSegments6 records
Ideal customer profiles3 records
SMS One technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Feature8 records
SMS One partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Topaz Inc. (.topaz.jp)coreSMSOne is a service brand provided by Topaz Inc., a company that delivers SMS solutions to major mobile carriers with trillions of yen in revenue. Topaz serves NASDAQ-listed global enterprises and provides multi-language SMS API and international SMS/telephone/FAX solutions across 258+ countries.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
SMS One competitors and assessment
Company assessmentDirect peers
- Twilio: Global cloud communications platform offering SMS APIs and direct carrier connectivity worldwide. Most comparable peer to SMSOne's B2B SMS delivery platform, though operating at significantly larger scale.
- MessageBird (now Bird): Global CPaaS platform offering SMS, voice, and customer engagement APIs with direct carrier integrations. Comparable to SMSOne in product offering and target use cases (marketing notifications, two-way messaging, international reach).
- Sinch: Swedish-based global CPaaS provider offering SMS, RCS, and messaging APIs with carrier direct connections. Comparable to SMSOne in business model (usage-based, API-first) and B2B positioning.
- Plivo: Cloud communications platform offering SMS and voice APIs with global carrier coverage. Comparable to SMSOne in API-first delivery model and B2B targeting of enterprises and developers.
- Infobip: Croatia-headquartered global cloud communications platform offering SMS, voice, and messaging solutions with direct carrier integrations across 200+ countries. Highly comparable to SMSOne's international SMS reach and carrier-direct architecture.
- Bandwidth Inc. US-based communications platform offering messaging APIs and direct carrier integrations. Comparable to SMSOne in owning the messaging infrastructure and offering programmable SMS.
- Vonage Communications APIs (Ericsson): Communications Platform-as-a-Service offering SMS, voice, and messaging APIs now owned by Ericsson. Comparable to SMSOne's programmable messaging platform and enterprise developer focus.
Regional players
- Linkage (Japan): Japan-based SMS and mobile marketing solutions provider serving Japanese enterprises. Comparable to SMSOne in domestic Japanese market focus, B2B SMS delivery, and marketing/notification use cases.
- CLARA ONLINE: Japanese cloud communications provider offering SMS, voice, and messaging services to domestic enterprises. Comparable to SMSOne in regional Japanese focus and SMB/enterprise SMS delivery.
Others
- NTT Docomo (SMS Gateway Services): Major Japanese mobile operator and one of SMSOne's carrier partners, also offering its own enterprise SMS gateway services. Relevant as both a partner/supplier and adjacent SMS service provider in Japan.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat4 records
Key highlights6 records
Customer concentration
SMS One social profiles
Digital presenceSMS One financial estimates
Financial estimateRevenue estimate
Valuation estimate
SMS One leadership team
Management profileNumber of profiles
Profiles1 record
SMS One funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SMS One M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about SMS One
What does SMS One do?
SMSOne is a Japanese SMS delivery service that connects directly to all four major domestic mobile operators (NTT Docomo, au, SoftBank, and Rakuten) to provide high-deliverability bulk and individual messaging for businesses. The platform supports long messages (up to 670 characters), two-way SMS, sender phone number or alphanumeric brand-name display, URL shortening with click tracking, CSV-based mass delivery, scheduled sends, and international SMS to 258+ countries. An auto-call add-on extends reach to landlines via text-to-speech.
Is SMS One a public or private company?
SMS One is a private company. It is classified as unknown and is currently operating.
When was SMS One founded?
SMS One was founded in 2018. It employs 501 to 1,000 people.
Where is SMS One based?
SMS One is headquartered in Sakura, Japan, in the Asia region.
How does SMS One make money?
One revenue line is on record: SMS Delivery (Usage-based).
Who are SMS One's main competitors?
Direct peers on record are Twilio, MessageBird (now Bird), Sinch, Plivo, Infobip, Bandwidth Inc. and Vonage Communications APIs (Ericsson). Regional players are Linkage (Japan) and CLARA ONLINE. NTT Docomo (SMS Gateway Services) is listed as an others.
Does SMS One have an API?
Yes. SMSOne provides API access for SMS delivery functionality. The API enables developers to integrate SMS sending capabilities into their applications. The source mentions "API対応" (API support) as a feature of the 4-carrier long-message SMS service. No specific documentation URL, SDK language, or rate limit details are provided.