BoldSign vs Nitro PDF
BoldSign and Nitro PDF are both Contracts & e-signature tools. Here is how they compare on pricing, audience, platforms and community votes.
Low-cost e-signature app and API from Syncfusion
PDF editor and e-signature suite positioned against Adobe Acrobat
| Pricing | Freemium · $15 | Paid · $15 |
| Built for | Small businesses, Freelancers, Enterprise, Developers | Small businesses, Enterprise, Freelancers |
| Platforms | web, ios, android | windows, macos, web, ios |
| Country | US | US · 2005 |
| Community votes | 0 | 0 |
| Rating | — | — |
BoldSign
BoldSign is an electronic signature app and API made by Syncfusion, the North Carolina software company best known for its UI component libraries. It targets businesses that find DocuSign too expensive and want transparent pricing, a usable free plan and a developer-friendly API. Its core job is preparing documents, sending them for signature and tracking them to completion with a full audit trail.
The web app offers templates, signer authentication, automated reminders, in-person signing, team management and AI-powered field detection. Business adds unlimited envelopes, SSO, custom roles, scheduled send, a custom email sending domain and HIPAA support. Add-ons cover bulk send, bulk links, SMS and WhatsApp delivery, ID verification, knowledge-based authentication and qualified electronic signatures. The free Essential plan allows 25 envelopes a month, and a separate Enterprise API plan with a free sandbox handles embedded signing and webhooks.
BoldSign fits small and mid-sized teams that send a steady volume of contracts and want unlimited envelopes for a flat per-user price. It has fewer native integrations and less brand recognition than DocuSign, and several advanced options are paid add-ons. DocuSign is safer for complex enterprise routing, Dropbox Sign has a polished API with Dropbox ties, and signNow is a similar value option backed by airSlate.
A buying tip: yearly billing cuts Growth from $15 to $5 per user and Business from $25 to $15, and Business is the plan that removes envelope caps.
Nitro PDF
Nitro PDF is the flagship product of Nitro Software, founded in Melbourne in 2005 and now headquartered in San Francisco. Nitro listed on the ASX in 2019 and was taken private by Potentia Capital in 2023. Its pitch has always been a cheaper, Office-style alternative to Adobe Acrobat for businesses that create, edit, convert and sign PDFs every day.
The suite covers PDF creation and conversion to and from Word, Excel and PowerPoint, editing, OCR, combining and splitting, redaction, password protection and comments, plus Nitro Sign for e-signatures with audit trails, reminders and multi-document envelopes. AI tools summarize, translate and extract data from documents, and Smart Redact, released in February 2026, finds sensitive data for review before permanent removal. Plans split into PDF Standard and Plus, Sign Standard, Plus and Enterprise, and a Windows-only PDF Classic license.
Nitro fits organizations that buy PDF seats in volume and want admin controls, SSO and deployment tools without Acrobat pricing. Foxit offers a similar desktop-first editor, Smallpdf and iLovePDF are lighter browser tools for occasional tasks, and DocuSign remains deeper for complex signature workflows. Linux users and teams needing Android apps are not covered.
Buying tip: PDF Standard and Sign Standard are each listed at $15 per user per month, billed annually, so check whether you need both. Online checkout is capped at 20 licenses; larger rollouts go through sales, where volume discounts apply to the Plus and Enterprise tiers. The 14-day trial needs no credit card.