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Clearstream VS ZelNum

Compare Clearstream VS ZelNum and see what are their differences

SIPNEX
Carrier-grade call tracking with dynamic number insertion, per-campaign tracking numbers, real-time CDRs, and A-level STIR/SHAKEN attestation. Know which campaigns drive calls. featured
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.
Contents:
  1. ยป Base Details
  2. ยป Videos
  3. ยป Reviews
  4. ยป Alternatives

Clearstream logo Clearstream

Clearstream is a SMS marketing and online texting software.

ZelNum logo ZelNum

Turn CSV/TXT lists into actionable segments with phone validation, carrier and HLR intelligence, messaging-app, social-account, and crypto-exchange checks, plus API workflows.
  • Clearstream Landing page
    Landing page //
    2023-06-20
  • ZelNum
    Image date //
    2026-07-27
  • ZelNum
    Image date //
    2026-07-27
  • ZelNum
    Image date //
    2026-07-27
  • ZelNum
    Image date //
    2026-07-27

ZelNum is a self-service bulk verification and data-quality platform for phone intelligence, messaging apps, social and consumer accounts, and crypto exchanges.

Upload CSV or TXT lists to check phone status, live activity, carrier and line type, HLR-style network signals, phone model, and duplicate or invalid records.

Run phone- and email-based account-signal checks across WhatsApp, Telegram, Facebook, TikTok, iMessage, RCS, Zalo, LINE, Viber, Instagram, LinkedIn, Snapchat, Signal, BAND, Amazon, Apple ID, and Microsoft, together with supported crypto exchanges such as Binance, KuCoin, CoinW, and HTX.

Depending on the product, workflows can include activity, account-age, username, and selected profile signals. Export structured segments for list cleaning, CRM preparation, messaging operations, community management, and data workflows.

Developers can use task-based APIs for batch submission, status monitoring, and result retrieval.

Clearstream

Website
clearstream.io
Pricing URL
Official Clearstream Pricing
$ Details
-
Platforms
-
Release Date
-
Edit details

ZelNum

Website
zelnum.com
Pricing URL
Official ZelNum Pricing
$ Details
freemium $1.0 (10,000 WhatsApp number checks)
Platforms
Web REST API SaaS
Release Date
2026 May
Edit details

Clearstream features and specs

  • Ease of Use
    Clearstream provides an intuitive user interface, making it user-friendly and easy for users to navigate and manage their messaging campaigns.
  • Integration Capabilities
    Clearstream offers robust integration options with popular platforms and services, enabling seamless connectivity with existing systems for enhanced functionality.
  • Automation Features
    The platform provides automation tools that help efficiently manage text messaging campaigns, reducing the need for manual intervention and saving time.
  • Comprehensive Analytics
    Clearstream offers detailed analytics and reporting features, allowing users to track campaign performance and make data-driven decisions.

Possible disadvantages of Clearstream

  • Pricing Structure
    Some users might find Clearstream's pricing tiers less competitive compared to other platforms, particularly small businesses with limited budgets.
  • Limited Customization
    While providing essential features, Clearstream might offer limited customization options for advanced users who require highly tailored messaging solutions.
  • Feature Limitations
    Certain advanced features, such as multimedia messaging or specific targeting options, may not be available or require higher-tier plans.
  • Learning Curve for Advanced Features
    While basic functionalities are simple, mastering all the advanced features may require additional time and effort from users, especially those less familiar with digital platforms.

ZelNum features and specs

  • Bulk Phone Validation
    Validate, normalize and segment phone numbers from CSV or TXT files.
  • Messaging App Checks
    Check selected phone-number and account signals across WhatsApp, Telegram, Facebook, iMessage, RCS, Zalo, LINE, and Viber.
  • Carrier and HLR Lookup
    Identify carrier, country, line type, and HLR-style network signals.
  • Phone Status and Activity Checksใ€‚
    Identify active, inactive, risky, and recently active numbers where supported.
  • Social Account Checks
    Check phone- and email-based account signals across Instagram, TikTok, LinkedIn, Snapchat, Signal, BAND, Amazon, Apple ID, and Microsoft.
  • Crypto Exchange Account Checks
    Check supported phone and email account signals across Binance, KuCoin, CoinW, and HTX.
  • Email Account Checks
    Check email-based account signals across supported platforms and services.
  • Phone Model Detection
    Detect the phone brand and model associated with a mobile number where available.
  • List Cleaning and Segmentation
    Remove duplicate or invalid records and export structured result segments.
  • CSV/TXT Bulk Uploads
    Upload contact lists for batch verification, cleaning, and segmentation.
  • REST API Workflows
    Submit batch tasks, monitor processing status, retrieve results, and integrate verification into applications.

Analysis of Clearstream

Overall verdict

  • Overall, Clearstream is considered a good option for businesses seeking a robust and easy-to-use text message marketing solution. Its combination of features, including automation, integration capabilities, and strong customer support, makes it a popular choice among its users.

Why this product is good

  • Clearstream (clearstream.io) is a text message marketing and communication platform that is generally well-regarded for its user-friendly interface, comprehensive feature set, and reliable customer support. It offers tools for mass texting, two-way messaging, and automation, which can help businesses effectively reach and engage their audiences. The platform is particularly praised for its ease of integration with various other marketing tools and services, making it a versatile choice for businesses looking to enhance their communication strategies.

Recommended for

    Clearstream is recommended for small to medium-sized businesses, non-profits, and churches that need an efficient way to communicate with their audiences through SMS. It's also suitable for marketing teams looking to integrate SMS marketing into their broader digital marketing efforts.

Analysis of ZelNum

Overall verdict

  • BulkChecker.io appears to be a bulk email/domain verification tool designed to help users validate large lists of email addresses to reduce bounce rates and improve deliverability, but as I don't have verified, up-to-date information on this specific service, I'd recommend researching current user reviews, checking recent uptime/accuracy reports, and testing with a small sample before committing to a larger plan.

Why this product is good

  • Bulk verification tools generally save time by processing large email lists quickly compared to manual checks
  • Such services typically help improve email deliverability by removing invalid or risky addresses before sending campaigns
  • May offer API access for integration into existing workflows or CRM systems
  • Often provide tiered pricing that can scale with list size, potentially cost-effective for growing needs

Recommended for

  • Email marketers needing to clean large subscriber lists before campaigns
  • Businesses looking to reduce bounce rates and protect sender reputation
  • Developers wanting API-based email validation integration
  • Users who should independently verify current pricing, accuracy rates, and customer support quality before relying on this specific service

Clearstream videos

+ Add

ClearStream 4Max VHF/UHF Indoor/Outdoor HD TV Antenna Review

More videos:

  • Review - ClearStream Max-V Indoor Outdoor VHF/UHF HD TV Antenna Review
  • Review - ClearStream Eclipse Amplified Indoor HD TV Antenna Review

ZelNum videos

No ZelNum videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Clearstream and ZelNum)

Clearstream

ZelNum

SMS Marketing
100 100%
SMS Marketing
0% 0
Data Validation
0 0%
Data Validation
100% 100
Communication
100 100%
Communication
0% 0
Phone Number Validation
0 0%
Phone Number Validation
100% 100

Questions & Answers

As answered by people managing Clearstream and ZelNum.

Why should a person choose your product over its competitors?

ZelNum's answer:

ZelNum supports multiple verification types, usage-based pricing, downloadable result segments, and task-based API processing without requiring a subscription.

How would you describe the primary audience of your product?

ZelNum's answer:

Marketing teams, CRM operators, developers, agencies, community managers, and businesses that need to clean or enrich large contact lists.

What makes your product unique?

ZelNum's answer:

ZelNum combines phone validation, carrier lookup, WhatsApp and Telegram checks, and other account signals in one bulk CSV/TXT and API workflow.

User comments

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What are some alternatives?

When comparing Clearstream and ZelNum, you can also consider the following products

E-goi - Email Marketing companies, SMS Marketing, software email marketing.

CheckNumber.AI - CheckNumber.AI provides professional and free WhatsApp number check online service, and provides a professional WhatsApp Number Checker API that can quickly check and detect WhatsApp number in bulk.

SMS Messaging - SMS Marketing is a social media management tool by Mitto that helps brands and retailers capture their customersโ€™ attention by crafting messaging campaigns across multiple platforms.

Numverify - Global phone number validation and lookup API

Textmarketer - Textmarketer offers Bulk SMS Marketing without set-up fees, contracts or software to download.

Lookup by Twilio - Know the details behind every phone number

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