Free open-source software that uses active learning to screen titles and abstracts for systematic reviews in less time.

VoiceSphere
Chat with your PDFs, Word, PowerPoint, text and CSV files by typing or speaking, and get answers drawn from the content.
What is VoiceSphere?
VoiceSphere is a document chat service where you upload files and then ask questions in plain language, by typing or by voice, instead of searching by keyword. It reads PDF, PPT, DOC, DOCX, TXT and CSV files, keeps the conversation going so you can ask follow-up questions, and can extract images from documents. Files are organized into collections and businesses, and email document processing is included on every plan. The site gives examples of use in manufacturing technical manuals, legal research, healthcare records, customer support and academic policy lookup. According to its help page, documents are stored encrypted in Amazon S3 and chat data sits in an AWS data center in North Virginia. VoiceSphere has a free plan with 1,000 pages and 100 questions, then Basic, Standard, Premium and Pro plans that raise the page and question allowances; the pricing page text does not show the dollar amounts.
Use cases
- Ask questions about uploaded PDFs
- Search technical manuals by question
- Look up laws and past cases
- Screen resumes against criteria
- Answer customer support queries from documents
- Query CSV and text files in plain language
- Extract images from documents
Who it's for
Why use VoiceSphere
- You ask a question in plain words and skip scanning through search results or long manuals.
- Voice input helps people who would rather speak than type queries.
- Follow-up questions let you narrow an answer without restarting.
- A free plan lets you try it on your own files before choosing a paid tier.
- Collections and businesses let teams keep documents grouped by department or project.
VoiceSphere features
- Ask questions by text or voice
- Follow-up questions in a running conversation
- Supports PDF, PPT, DOC, DOCX, TXT and CSV files
- Image extraction, excluding vector images and SVG
- OCR support on the Standard plan
- Unlimited businesses and collections
- Email document processing
- Documents stored encrypted in Amazon S3
- Document management for organizing and securing files
VoiceSphere integrations
How to get started with VoiceSphere
- Sign up and create a business and a collection for your files.
- Upload PDF, PPT, DOC, DOCX, TXT or CSV documents.
- Let the system process the files, which includes image extraction.
- Ask a question by typing or speaking and read the answer drawn from your documents.
- Keep asking follow-ups until you find what you need.
VoiceSphere limitations
- Free plan allows 1,000 pages and 100 questions
- Vector images and SVG formats are excluded from image extraction
- Chat data is hosted in a North Virginia AWS data center
- Video support is shown on the homepage only as a coming-soon item
VoiceSphere pricing
Yes, VoiceSphere has a free plan.
VoiceSphere plans
Free
Free
- 1,000 pages across all files
- Up to 100 questions including voice
- Unlimited businesses and collections
- Standard support
Basic Plan
Price on vendor site
- 5,000 pages across all files
- Up to 500 questions including voice
- Standard support
Standard Plan
Price on vendor site
- 10,000 pages across all files
- Up to 1000 questions including voice
- OCR support
- Standard support
Premium Plan
Price on vendor site
- 25,000 pages across all files
- Standard support
Pro Plan
Price on vendor site
- 50,000 pages across all files
- Up to 5000 questions
- Standard support
Plans as listed on the official pricing page on . Prices can change and may vary by country or exclude tax. Check the official pricing page.
VoiceSphere alternatives
The main VoiceSphere alternatives listed on Debuly are ChatPDF, Chat with PDF by Copilot.us, Gemini Notebook, aiPDF, Perplexity and CreativAI. The table compares pricing and platforms; order is A–Z.
| Tool | Pricing | Starting price | Platforms |
|---|---|---|---|
| VoiceSphere | Freemium | — | Web |
| aiPDF | Freemium | $9/mo | Web |
| Chat with PDF by Copilot.us | Free trial | — | Web |
| ChatPDF | Freemium | — | Web |
| CreativAI | Freemium | $180/yr | Web, API |
| Gemini Notebook | Freemium | — | Web |
| Perplexity | Freemium | $17/mo | Web, API |

aiPDF
Chat app that summarizes PDFs, EPUBs, web pages and YouTube links, then answers questions about them with references to the source text.
FreemiumVisit aiPDF (official site)
Chat with PDF by Copilot.us
AI PDF assistant that answers questions about one or several PDFs or Google Drive files and points to the source page.

ChatPDF
Upload a PDF, Word or PowerPoint file and ask questions in any language, with answers linked to the source page.
FreemiumVisit ChatPDF (official site)
CreativAI
Video intelligence platform that indexes footage and images so you can search, chat with and extract data from them.
FreemiumVisit CreativAI (official site)
Gemini Notebook
Google's source-grounded research notebook, formerly NotebookLM, that answers questions and builds overviews from the documents you upload.

Perplexity
AI answer engine that searches the web, cites sources inline and offers deep research, multi-step tasks and a choice of top models on paid plans.
FreemiumVisit Perplexity (official site)
VoiceSphere FAQ
How much does VoiceSphere cost?
There is a free plan, plus Basic, Standard, Premium and Pro plans. The pricing page text reviewed does not show the dollar amounts, so check the site for current prices.
Is there a free plan for VoiceSphere?
Yes. The help page says the free plan includes unlimited businesses and collections, 1,000 pages across your files, 100 questions including voice, and standard support.
What plans does VoiceSphere have?
Free, Basic (5,000 pages, 500 questions), Standard (10,000 pages, 1000 questions, OCR), Premium (25,000 pages) and Pro (50,000 pages, 5000 questions).
Which file types does VoiceSphere support?
PDF, PPT, DOC, DOCX, TXT and CSV files are listed as supported.
How does VoiceSphere secure documents?
Documents are stored in Amazon S3 with encryption and delivered through Amazon CloudFront. Chat data is kept in an AWS data center in North Virginia, US.
Who is VoiceSphere for?
The site points to manufacturing and service staff, medical professionals, law firms, researchers, recruiters and customer service teams.
What are alternatives to VoiceSphere?
Other tools for chatting with documents include ChatPDF, AskYourPDF, PDF.ai and NotebookLM.
Sources & verification
Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.
| Source | Type | Accessed |
|---|---|---|
| voicesphere.co/ | official | |
| voicesphere.co/pricing/ | pricing | |
| voicesphere.co/help/ | official | |
| voicesphere.co/simplifying-legal-information-access-with-voicesphere/ | official | |
| voicesphere.co/chat-with-documents-using-voicesphere/ | official |
Image credits
- Logo: from voicesphere.co · fetched · Vendor trademark, used only to identify the product; removed on request
- Cover: none collected yet, so a generated tile is shown.
Spot an error? Report an issue with this listing. We also remove a logo or image on the owner's request.




