WEB内線 lets website visitors make browser-based voice calls to your team with no phone number needed. See pricing (from ¥0/month), features, and use cases for…
Category
Communication
Pricing
Freemium: Free ¥0/mo (1 seat), Standard ¥3,000/mo (3 seats), Business ¥9,800/mo (10 seats), Enterprise custom quote.
Verified
Not yet
Last updated
August 5, 2026
SaaSFree PlanSMBSubscriptionBrowser Based
WEB内線 ("Web Naisen", literally "Web internal line") is a browser-based voice-call reception widget that Japanese businesses embed on their websites. Instead of publishing a phone number, a site owner installs a single call button; when a visitor clicks it, the call rings in the business's browser dashboard, where staff answer using their computer's microphone and speaker — no phone number is exchanged on either end. The vendor documents a four-step setup: install the button, receive the incoming call in-browser, talk via mic/speaker, and save notes and call history to a dashboard. Unanswered calls fall back to voicemail (留守電), with retention ranging from 1 day on the Free plan to 30 days on the Business plan. The product is aimed at Japanese SMBs and is marketed around six use cases: professional-service firms (law/accounting), storefront and retail businesses confirming visit availability, real-estate/renovation consultations, recruitment sites fielding candidate questions, hotels/facilities for guest-to-staff communication, and events/exhibitions where staff are paged via QR code. Paid plans add Slack and Chatwork notifications so teams see incoming calls in the chat tools they already use. Signup is self-serve via a free member registration flow, with a live demo call page available to try the experience before signing up.
Key Features
Browser Voice Call Widget — Visitors click an embedded button to place a voice call to staff without either side needing a phone number.
Voicemail Fallback — Unanswered calls go to voicemail, with retention scaling from 1 to 30 days by plan.
Slack & Chatwork Notifications — Standard plan and above alert teams of incoming calls in Slack or Chatwork.
Pros & Cons
Pros
Free tier (¥0/month) with no setup fee lets small sites trial browser-based voice reception before committing to a paid plan.
Visitors can reach staff without knowing or dialing a phone number, lowering friction for pre-sale or pre-visit questions.
Standard plan and above add Slack and Chatwork notifications, so teams are alerted to incoming calls inside tools they already use.
Documented across six distinct verticals (professional services, retail, real estate, recruitment, hospitality, events), suggesting a flexible, general-purpose widget rather than a single-niche tool.
Cons
The product is Japanese-language only (html lang="ja") with no evidence of an English interface, limiting its addressable market.
No operator/company legal name, address, or business registration details are published on the homepage, terms of service, or privacy policy — unusual for a paid Japanese SaaS product.
No public API, CRM, or website-builder integrations are documented — only Slack and Chatwork notifications are mentioned.
Enterprise pricing is a black-box custom quote with no published starting price or SLA detail beyond multi-domain/multi-location support.