Compare JoltSMS to VoIP apps and "second numbers"
Most VoIP and "second number" apps are built for calls and casual texting—not reliable SMS verification. JoltSMS gives you dedicated, non-VoIP, real-SIM US numbers with a shared inbox, notifications, and Team Access, so your team can keep critical accounts verified long term.
- Non-VoIP, real-SIM numbers designed for SMS verification
- Long-term rentals instead of disposable numbers
- Shared inbox + Slack/Discord/Email/Webhook notifications
- Team access with roles (Owner/Manager/Viewer)
JoltSMS is not another VoIP calling app
Apps like Burner, Hushed, Line2, 2ndLine, TextNow, Google Voice, OpenPhone, and others are designed as VoIP calling/messaging products. JoltSMS is different: it's focused on account verification, shared access, and long-term reliability for teams.
| Product type | Primarily built for | Not great at |
|---|---|---|
| JoltSMS | Reliable SMS verification, shared inbox, team workflows | General calling, consumer texting |
| VoIP / second-number apps (Burner, Hushed, Line2, TextNow, etc.) | Cheap calling & texting, personal/private numbers | Verification on platforms that don't like VoIP, shared team access |
| Business phone systems (OpenPhone, Grasshopper, etc.) | Call routing, business phone lines, voice features | Centralized SMS verification & audit across tools |
| Personal SIM on one phone | Normal phone use for one person | Shared access, offboarding, multi-team visibility |
Key differences between JoltSMS and typical VoIP/second-number apps
| Feature / concern | JoltSMS | VoIP / "second-number" apps | Business phone systems | Personal SIM |
|---|---|---|---|---|
| Number type | Non-VoIP, real-SIM US mobile | VoIP | Mostly VoIP | Real SIM, personal |
| Designed for | SMS verification, shared access, teams | Calling & casual texting | Voice, call routing | One person's usage |
| Long-term rental | Yes, keep same number month-to-month | Often short-term / easily swapped | Yes | Yes, but tied to person/SIM |
| Shared inbox for SMS | Yes | Usually no | Limited / not verification-focused | No |
| Team roles & access (Owner/Manager/Viewer) | Yes | No | Sometimes, but voice-centric | No |
| Slack/Discord/Email/Webhook notifications | Yes | Rarely | Some integrations, not tailored to verification | No |
| Focus on verification & re-verification | Core use case | Side effect | Not primary | Ad-hoc, per person |
If you mainly need calling and general texting, VoIP apps may be enough. If you need reliable SMS verification that a team can share and audit, JoltSMS is built for that.
Why teams choose JoltSMS over VoIP apps and personal numbers
JoltSMS is opinionated: it's not trying to be a full phone system. It's deliberately narrow and deep on verification, team workflows, and reliability.
- Non-VoIP, real-SIM US numbers instead of VoIP ranges
- Long-term rentals so re-verification months later still works
- Shared inbox so multiple people can see verification codes
- Notifications to Slack, Discord, Email, and Webhooks
- Team Access with Owner/Manager/Viewer roles for up to 10 users per number
- Simple, predictable pricing per number
Pick a comparison to see the details
JoltSMS vs Google Voice
Why a real-SIM number with a shared inbox works better for team verification than a single Google Voice line.
JoltSMS vs Burner
When you need long-term, team-shared verification instead of short-lived disposable numbers.
JoltSMS vs OpenPhone
JoltSMS for verification workflows vs OpenPhone for full business calling.
JoltSMS vs Line2
Real-SIM verification backbone vs business VoIP second line for calls and texting.
JoltSMS vs TextNow
Dedicated team verification numbers vs free personal VoIP texting app.
JoltSMS vs Hushed
Long-term verification infrastructure vs disposable VoIP numbers for privacy.
When to choose JoltSMS vs a VoIP or phone app
Use JoltSMS when:
- You care about SMS verification and re-verification working reliably
- Multiple people need to see codes for the same accounts
- You want numbers that are company-owned, not tied to one device
- You need codes in Slack/Discord/Email/Webhooks
- You need some level of auditability and separation of duties
Use VoIP / business phone apps when:
- You mainly need calling, texting, voicemail, and call routing
- SMS verification is rare or secondary to your use case
- A single person (or small group) can own the number without issue
- You're replacing a traditional phone line, not building a verification backbone
Moving from "who has the phone?" to "check the inbox"
A lot of teams start by using someone's personal SIM for verification. It works… until that person is offline, traveling, or leaves. JoltSMS replaces that pattern with a shared, company-owned number and inbox.
| Aspect | Personal SIM on a phone | JoltSMS |
|---|---|---|
| Ownership | Individual | Company |
| Access | One device (maybe screenshots in chat) | Shared inbox, up to 10 team members per number |
| Offboarding | Risky; must change numbers everywhere | Remove user from Team Access; number stays |
| Notifications | Device-only | Slack, Discord, Email, Webhooks |
| Audit history | Manual at best | Central message history in JoltSMS |
Comparison FAQ
No. JoltSMS is focused on SMS verification, shared inboxes, and team workflows, not full calling and voice features. Many customers use JoltSMS alongside a phone system.
See how JoltSMS fits alongside (or instead of) your current setup
Use a dedicated non-VoIP, real-SIM US number with a shared inbox, notifications, and Team Access for the accounts your team can't afford to lose.