The 6 Best Electronic Signature Services for Adding Signatures to PDFs (2026)

Quick Answer: Adobe Acrobat Sign is the top pick among the best electronic signature services for 2026, thanks to a Fill and Sign toolkit that auto-detects signature fields, converts existing Word documents into signable PDFs, and starts at $14.99 per user per month on the Acrobat Standard plan. It’s built for professionals and small teams who need PDF editing and signature routing inside one subscription rather than juggling separate tools. For pure high-volume signature workflows without PDF editing, DocuSign and SignNow are strong alternatives, but Acrobat Sign’s combined PDF-and-signature workflow makes it the most versatile starting point for most buyers.

Introduction

This guide compares six electronic signature services against five criteria: free tier limitations, integration depth, compliance certifications, pricing transparency, and workflow flexibility for routing and bulk sending. It’s written for freelancers, sales teams, HR departments, and legal-adjacent professionals who need to send, track, and close signed PDFs without switching software. Every price and feature claim below was checked against each vendor’s official pricing and product documentation rather than pulled from secondary aggregators. Of the six tools compared, Adobe Acrobat Sign comes out on top for professionals who need PDF editing and electronic signature services combined in one subscription.

Electronic Signature Services Comparison

Tool NameFree TierPlatformBest ForTemplates / Design AssetsStandout Feature
Adobe Acrobat SignNoWeb, Windows, Mac, iOS, AndroidLegal and HR pros editing and signing PDFs in one loginNot publicly listedConverts existing Word docs into signable PDFs with auto-detected fields
DocuSignNoWeb, iOS, AndroidSales and ops teams needing a recognized brand with deep CRM tiesNot publicly listed900+ pre-built integrations across CRMs and productivity suites
PandaDocYes (5 docs/mo, signing only)Web, iOS, AndroidSales teams building proposals with e-signature and CRM bundledUnlimited on paid tiers, none on FreeFree eSign plan signs existing files at no cost, capped at 5/month
Dropbox Sign (HelloSign)Yes (3 requests/30 days)Web, iOS, AndroidFreelancers and small teams already living in DropboxNot publicly listedAES 256-bit encryption at rest with native Dropbox file integration
SignNowNoWeb, iOS, AndroidReal estate, insurance, and accounting teams needing low-cost sendingUnlimited (Business plan and up)100 signature invites/year included, then $0.96–$3.60 per extra invite
SigneasyNoWeb, iOS, AndroidSmall teams wanting AI contract extraction and SSO on higher tiersUnlimited (Business plan and up)AI-powered contract data extraction included on the $20/mo Business plan

Adobe Acrobat Sign

Adobe Acrobat Sign is the electronic signature layer built into Adobe’s Acrobat subscription lineup, letting anyone who already edits PDFs also request signatures and track status from the same login. Because the tool lives inside Acrobat, users can sign PDFs directly in a browser and convert existing Word documents into signable forms without maintaining a separate signature-only account. It’s the strongest option in this comparison for legal, HR, and real estate professionals who prepare, edit, and sign documents inside a single workflow.

Acrobat Sign is the only tool in this comparison that pairs full PDF editing with electronic signature services in the same subscription, starting at $14.99 per user per month for the Acrobat Standard plan.

Key Features

  • Fill and Sign auto-detects likely signature fields on any uploaded PDF and can convert existing Word documents into signable forms, so teams don’t have to rebuild documents from scratch.
  • Sequential and parallel signer routing lets senders control the exact order in which multiple signers complete a document.
  • Acrobat Pro for teams, at $22.19 per user per month billed annually, adds bulk sending, custom branding, and signable web forms on top of the Standard plan.
  • Built-in compliance coverage for HIPAA, 21 CFR Part 11, and eIDAS ships standard, which matters for regulated industries that need an audited signature trail without an enterprise add-on.
  • Auto-fill pulls data from previously completed forms, which speeds up repetitive document types like intake paperwork or onboarding packets.

Pricing: Acrobat Standard starts at $14.99 per user per month billed annually with basic PDF editing, e-signature tools, and Microsoft 365 integration. Acrobat Pro for teams runs $22.19 per user per month annually and adds bulk sending, custom branding, and web forms. Acrobat Studio for teams, at $27.74 per user per month, layers in Acrobat AI Assistant and PDF Spaces on top of Pro. These figures reflect Adobe’s published 2026 business-tier rate card; confirm current numbers on Adobe’s pricing page before purchasing, since Adobe adjusts tier pricing periodically.

Platforms: Web, Windows, Mac, iOS, Android.

Best For: Legal, HR, and real estate professionals who need PDF editing and signature routing under one login.

Full plan details, including feature-by-feature tier comparisons, are documented on Adobe’s official Acrobat business pricing page.

DocuSign

DocuSign remains the most recognized brand among electronic signature services, and it’s frequently the default choice for teams that just need a document routed for signature without any PDF editing attached.

DocuSign’s Business Pro plan costs $40 per user per month annually and remains one of the most recognized electronic signature services for teams that need bulk send, payment collection, and 900-plus integrations in one subscription.

Key Features

  • Personal plan, $10 per user per month billed annually, covers 5 envelopes per month for one user with reusable templates included.
  • Standard plan, $25 per user per month billed annually, raises the cap to about 100 envelopes per user per year and adds shared team templates plus collaborative commenting.
  • Business Pro, $40 per user per month billed annually, adds bulk send, payment collection, and advanced fields for teams handling higher volume.
  • More than 900 pre-built integrations connect DocuSign to CRMs, HR systems, and productivity suites like Salesforce and Microsoft 365 out of the box.

Pricing: Personal costs $10/user/month annually (5 envelopes/month); Standard costs $25/user/month annually (about 100 envelopes/user/year); Business Pro costs $40/user/month annually with bulk send and payment collection; Enterprise is custom-quoted.

Platforms: Web, iOS, Android.

Best For: Sales and operations teams that need a widely recognized signature brand with deep CRM integrations.

DocuSign publishes its full eSignature plan lineup, including envelope allowances and add-on costs, on its official product page, which is worth checking directly since pricing and envelope limits shift periodically.

PandaDoc

PandaDoc positions itself as document creation and electronic signature services combined, built primarily for sales teams that need proposals, quotes, and contracts signed inside one workflow. Its Free eSign plan is unusual in this comparison: it permits signing existing files at no cost, capped at 5 documents per month (60 per year), but doesn’t include PandaDoc’s document creation or template tools.

PandaDoc is the only tool in this comparison offering a free tier that includes electronic signatures for existing documents, capped at 5 documents per month, though full document creation requires the $19-per-month Starter plan.

Key Features

  • Free eSign plan allows signing existing uploaded files at no cost, capped at 5 documents per month (60 per year), with no document-creation tools included.
  • Starter plan, $19 per user per month billed annually, unlocks the drag-and-drop document editor and customizable templates, moving from zero saved templates on Free to unlimited saved templates on paid tiers.
  • Business plan, $49 per user per month billed annually, adds CRM integrations with Salesforce and HubSpot plus approval workflows for larger sales teams.
  • Real-time document tracking shows the exact moment a recipient opens, views, and signs a document, without a separate tracking add-on.

Pricing: Free plan covers 5 documents per month (signing only); Starter costs $19/user/month annually; Business costs $49/user/month annually with CRM integrations; Enterprise is custom-quoted.

Platforms: Web, iOS, Android.

Best For: Sales teams building proposals and quotes who want e-signature and CRM integration in the same platform.

Dropbox Sign (formerly HelloSign)

Dropbox Sign, still commonly searched under its original name HelloSign, was acquired by Dropbox in 2019 and rebranded in 2023, though both names return the same product in search results today. Its permanent Free plan is the most restrictive in this comparison: 3 signature requests every 30 days for one sender, though unlimited self-signing doesn’t count against that cap.

Dropbox Sign, the product formerly known as HelloSign, caps its permanent free plan at 3 signature requests every 30 days, the tightest free-tier limit among the electronic signature services in this comparison.

Key Features

  • Free plan allows 3 signature requests every 30 days for one sender, with unlimited self-signing that doesn’t count against that limit.
  • Essentials plan, $15 per user per month billed annually, removes the request cap entirely for a single user and adds reusable signature templates that the Free plan doesn’t include.
  • Standard plan supports teams of up to 4 users and adds custom branding plus bulk send at a higher per-user rate.
  • Documents are protected with AES 256-bit encryption at rest, and two-factor authentication is available on paid tiers.

Pricing: Free plan covers 3 signature requests per 30 days; Essentials costs $15/user/month annually with unlimited requests for one user; Standard scales per-user for teams up to 4; Premium is custom-quoted with SSO.

Platforms: Web, iOS, Android.

Best For: Freelancers and small teams already living in Dropbox who want signing built into existing file storage.

SignNow

SignNow, owned by airSlate, positions itself as the lowest-cost unlimited-template option among mainstream electronic signature services, though every subscription tier caps signature invites at 100 per user per year regardless of plan.

SignNow’s Business plan starts at $8 per user per month billed annually, the least expensive entry point among the electronic signature services compared here, though every tier caps signature invites at 100 per year.

Key Features

  • Business plan, $8 per user per month billed annually, unlocks unlimited templates and mobile apps for iOS and Android at the lowest entry price in this comparison.
  • Business Premium, $15 per user per month billed annually, adds bulk sending, signing links, and document groups for teams routing multiple signers.
  • Enterprise, $30 per user per month billed annually, introduces smart fillable fields and conditional documents for more complex forms.
  • Every subscription tier caps signature invites at 100 per user per year, with overage billed at $0.96 (Business), $1.80 (Business Premium), or $3.60 (Enterprise) per extra invite.

Pricing: No permanent free plan; only a 7-day free trial. Business costs $8/user/month, Business Premium $15/user/month, Enterprise $30/user/month, all billed annually. Full API access requires the separate Site License plan at roughly $1.50 per signature invite.

Platforms: Web, iOS, Android.

Best For: Real estate, insurance, and accounting teams that need low-cost, unlimited-template signing without full CRM-grade proposal tools.

Signeasy

Signeasy rounds out this comparison as a lighter-weight, AI-assisted alternative, with a Personal plan at $10 per month for a single seat that allows unlimited signing but caps outbound sends at 5 contracts per month.

Signeasy’s Business plan, at $20 per user per month, adds AI-powered contract data extraction and removes the 5-contract-per-month send cap that applies to its $10 Personal plan.

Key Features

  • Personal plan, $10 per month for a single seat, allows unlimited document signing but caps outbound sends at 5 contracts per month.
  • Business plan, $20 per user per month, removes the send cap entirely and adds an admin dashboard plus AI-powered contract data extraction.
  • Business Pro, $30 per user per month, layers in role-based permissions, signer two-factor authentication, and enterprise integrations including SharePoint and HubSpot.
  • Integrations with Google Workspace and Microsoft 365 let users send documents for signature without leaving either ecosystem.

Pricing: Personal costs $10/month for one seat (5 sends/month cap); Business costs $20/user/month (unlimited sends); Business Pro costs $30/user/month; custom Enterprise pricing applies above 10 users.

Platforms: Web, iOS, Android.

Best For: Small teams that want AI-assisted contract data extraction and SSO on higher tiers without a full CRM-integration platform.

How to Choose the Right Electronic Signature Service

Low-cost solo signing under 10 documents a month

Prioritize tools with per-envelope or per-send pricing rather than flat per-user team plans. DocuSign Personal ($10/month, 5 envelopes) and SignNow’s Business plan ($8/user/month after its 7-day trial) both fit this pattern without forcing a team-size commitment.

PDF editing that matters as much as signing

Prioritize tools built around a Fill and Sign workflow rather than a signature-only inbox. Adobe Acrobat Sign is built specifically for this combination, since Acrobat Standard bundles PDF editing and e-signature in one $14.99 license.

CRM-integrated proposals, not standalone signature requests

Prioritize document-creation tools over pure e-sign tools. PandaDoc and Signeasy both attach signing to a broader proposal or contract workflow, with PandaDoc’s Business tier adding Salesforce and HubSpot integration and Signeasy’s Business Pro adding SharePoint and HubSpot.

Non-negotiable compliance certification

Prioritize tools that publish built-in compliance coverage rather than requiring a custom enterprise quote. Adobe Acrobat Sign and DocuSign both document HIPAA, eIDAS, and related certifications directly on their standard business tiers.

Frequently Asked Questions

1. What is the best electronic signature service for small teams in 2026?

For small teams that need both PDF editing and signing, Adobe Acrobat Sign is the strongest fit in 2026, especially at the $22.19-per-user Pro tier that adds bulk sending and web forms. Teams that only need to route signatures without editing PDFs can save money with SignNow’s Business Premium plan at $15 per user per month. Both include unlimited templates, but SignNow caps signature invites at 100 per user per year, while Adobe’s team plans don’t carry the same envelope-style limit.

2. Is DocuSign or Adobe Acrobat Sign better for signing PDFs?

DocuSign is the more recognized name for pure signature workflows, with Business Pro at $40 per user per month adding payment collection and advanced fields. Adobe Acrobat Sign is the better choice for anyone who also edits, converts, or redacts PDFs, since Acrobat Standard at $14.99 per month bundles PDF tools with e-signature in a single license. Adobe publishes its full plan lineup, including feature-by-feature comparisons for each tier, on its official pricing page.

3. Does SignNow have a free plan?

No. SignNow offers only a 7-day free trial rather than a permanent free tier, unlike Dropbox Sign or PandaDoc. After the trial, the entry-level Business plan costs $8 per user per month billed annually, with unlimited templates and mobile apps included.

4. What happened to HelloSign?

HelloSign was acquired by Dropbox in 2019 and rebranded as Dropbox Sign in 2023, though the product still appears under both names in search results. The rebranded service keeps the free plan structure that made HelloSign popular: 3 signature requests every 30 days with unlimited self-signing.

5. Can I sign a PDF for free without creating an account?

Most tools in this comparison require a free account before you can send or sign a document, though several let you sign a document sent by someone else without paying. PandaDoc’s Free eSign plan supports signing existing files at no cost (capped at 5 documents per month), and Adobe’s browser-based signing tools can handle simple one-off signature needs without a full Acrobat subscription.

Conclusion

Across the six electronic signature services compared here, the real split is between pure signature tools and PDF-native platforms. DocuSign, SignNow, Dropbox Sign, and Signeasy all specialize in routing and collecting signatures at price points from $8 to $40 per user per month, while PandaDoc and Adobe Acrobat Sign attach signing to a broader document workflow, either sales proposals or full PDF editing. For most professionals who need to prepare, edit, and sign PDFs without maintaining two separate subscriptions, Adobe Acrobat Sign remains the top recommendation among these electronic signature services, since its $14.99-per-month Standard plan is the only option in this comparison that bundles PDF editing with signature routing rather than treating them as separate products.

Teams evaluating a switch should weigh envelope and invite caps as closely as sticker price. SignNow’s $8 entry price and Dropbox Sign’s free tier both look attractive until the 100-invite and 3-request limits are factored in, so the right choice ultimately depends on real monthly volume rather than the lowest advertised rate.

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